Why spend time on deal with ban evasion instead you can spend time to serve who really need the community and make stuff better ?
Poorly
For remote actors, it seems to mostly rely on banned users not being very imaginative when it comes to naming subsequent accounts, and/or them not being able to leave a particular subject alone.
The answer is spread amonst the comments you’ve already got.
It’s a combination of regular bans, IP bans, moderators knowing the ‘regulars’ and recognizing their (bad) behaviour. And the Lemmy admins have a Matrix chat(?) room where they exchange info.
It doesn’t. That’s a feature, not a bug.
You can do IP bans, but only your current instance really knows your IP. You can sign up to any others and you’re just a fresh user to them.
Maybe the bigger instances share info about known CSAM uploaders between them, I dunno.
