Eh, if it were easier to block an instance as a user, I’d be 100% with you instead of 95%.
There are instances that are batshit crazy. Since blocking an instance as a user just ain’t possible yet, I can see why defederation before trouble gets going is useful. Once the nasty side of the internet gets snowballing, it’s much harder to manage.
Troll, or serious extremist, some things are just cancerous.
I dunno, I was up and running in five minutes. You pick an instance, you sign up, you verify the email, and you’re good to go. What server doesn’t matter much, barring it closing unexpectedly and without warning. There’s not enough users to need more than a handful.