I always used to dream of one day having my own social media site. I just never wanted to have to deal with the asshats that would show up.
Fediverse lets me have that experience while being able to block anyone that I want for any reason at any time.
The biggest issue I've come across so far would be ban evasion. There's 20,000+ instances so if someone wants to stalk you, it's trivial to do so. I wish there was a clear way to stop that, but as someone that has no programming knowledge, I'm not sure it can be done...
The same thing can be said about who is reading or using your data. There's just no way to accurately have that information unless you keep your account locked and post "Followers only".
@BeAware if one of the code bases allowed it, in theory you could either add an option or modify block to deal with mac/ip address and not just the user name of the instance. But I'm not sure if any othe stacks (mastodon, pixelfed,sharkey, miskey, etc etc) support any of that or if activitypub itself does