Part of the problem with #blocking in the fediverse, unique here as opposed to other social networks, is that there is a significant amount of "bycatch" in a lot of our instance blocking

If you block an instance you are blocking every member of that instance.

Maybe that's what you and your users want! That's what you are going for!

But it also means that to some extent _most_ servers are going to have a group of people who are essentially false positives: they aren't going to harass anyone
1/ 

 @a835d3d3 i start to think that admin should never use such an option, against whatever kind of instance.

Normal user can and should eventually block whole instances for jst themselves.

It’s like my email provider deciding that my friend, prince of Nigeria, can’t write me to offer me an opportunity.

Spam management is a personal choice.