Admin abuse: yea, but unlike reddit you can just move to another instance.

Reposting: you don’t have to subscribe to all communities. And you can block communities if you don’t want to see them in your local or all tab.

Privacy: depends on which instance you choose. Do your research.

Server: I am not sure about this, but I think the server strain is placed on the subs who generate the most content / have the most users. More users means more potential for donations, which means the devs can buy better servers.

A single “entire” instance being ruined is a much smaller problem than a whole platform.

As for the duplicate community problem, I would love to see either a multi-reddit-like feature or the ability to merge/co-mingle “duplicate” communities across instances.

The solution to tyrannical mods or admins is simple: “take your ball and go home” by starting your own instance, or your own community on a separate instance. That said, instances and communities grow by growing trust between users and mods/admins by a track record of acting in a rational and trustworthy way.

Privacy is definitely a problem for Lemmy. You should assume everything you post or comment is public and in the open, and impossible to fully delete, because it is. Post accordingly. You could theoretically be identified by the sum total of all personally identifying information you freely post over a long enough time or by your writing style if a government considered you a real threat.

That said, many instances do not even require an email address. I don’t know whether instances store data like IP addresses, but you could check the lemmy source code to find out.

Edit: But also, who’s to say their server source code is unaltered? Federation lives and dies by trust and mutual cooperation, and that cannot be guaranteed.

If we could easily pack our account, subscription and history to another instance the admin abuse will be at least tolerable

ADMIN/MOD ABUSE: Redditors are no strangers to mods/admins nuking comments, astroturfing, signal boosting/silencing, and so on. Doesn’t that problem just become worse in a federated system? As an example, a subreddit mod may ban users for whatever reason, but a lemmy instance admin could drag all their communities into their own drama if they choose to defederate, no? Losing access to entire instances instead of just one community/subreddit based on a power-tripping admin seems a big flaw. Am I missing something?

Yes and no. There are certainly concerns with “little dictators” hosting instances or individuals with an agenda manipulating content on their instance. The difference to a site like reddit or twitter is that this power and influence stops at the instance border, nobody controls lemmy, so people can always migrate to another instance if something like this happens.

And with reddit, admins don’t just control individual subreddits. There are of course admins that control all of reddit.

REPOSTING/X-POSTING: Reddit was already just the same tweets posted to like forty different subreddits, recycled weekly. On lemmy, there are now a handful of instances that contain virtually the same communities too. The lemmy.world/c/memes and lemm.ee/c/memes communities will post virtually the same content. And that’s just one. Aren’t feeds going to be overrun by duplicate posts in /All?

This is just an normal characteristic of decentralized services in general and I think it will resolve itself over time. There are of course also many different websites that host similar content and there are similar subreddits that host similar content. Over time, one will establish itself and become the main community.

I have no clue about this… are there extra security or privacy issues with something like lemmy?

Information tends to be more transparent and open on the fediverse. Stuff you post on lemmy is not private. Your personal information you provide when signing-up is of course readable by the person who hosts the instance or people who have admin access. However, at the moment at least, lemmy instances are not run for profit and don’t use/sell your data for profit.

There are privacy concerns, there are always privacy concerns. It’s important to teach users how to protect themselvs by consciously controlling what information they reveal about themselves. This is much more important and effective than trying to control what others might do with your information.

This kinda goes without saying, but a small instance will already struggle to host even their own local users as traffic increases.

Here I have to speculate because I just don’t know enough about the technical side of it. At the moment, most issues seem to be cause by software bugs, not by too much traffic or hardware performance.

Handling high amounts of traffic and activity is always tricky. I believe scalability will probably be an issue that will arise, maybe sooner than later, but I don’t think it’s an unsolvable issue.

Lemmy isn’t a perfect solution. The problem with Fediverse technologies is that they’re not actually decentralized, they’re polycentric. As you pointed out, an instance admin can make a lot of trouble for the users of their instance.

However, it is a step in the right direction. The cost of switching from a particular instance to another is fairly low. Your point about reposting supports this argument. If other communities offer the same content, there’s no need to tolerate bad administration.

I don’t really see reposting as a serious problem. It’s a minor annoyance.

Privacy, I don’t think the privacy concerns are more serious with lemmy than with something like reddit. Just don’t any personal information to your account if you can avoid it.

Server issues, I don’t know what the solution is to that.

at least with Lemmy, if you’re dealing with a bad admin or mod, you can move to a new instance …

We saw admin power abuse just yesterday on lemmynsfw.com . A new admin came in and banned any non-vanilla R34, but more egregiously (if the leaks are to be believed) wants to ban any regular porn if it doesn’t come from a “trusted source” and wants people to ID themselves with their government IDs if they are deemed “too young looking” by the moderation.

I haven’t been able to get into the “flow” of Lemmy to really enjoy it since joining within the last week but…

Reposting/X-Posting is the thing I’m most worried about. It is the thing that annoyed me most on reddit. Seeing the same post 2 or 3 times on the frontpage at the same time is obnoxious.