I disagree. The only servers that should be blocked are those that fail to address their users who engage in unwanted tagging. That's harassment/abuse. It drives away users. I could support a list of servers somehow so verified.
But to go further than this is a kind of censorship of content allowed elsewhere on the web. Stuff we basically never stumble on while browsing. Without algos here, it will never be forced on us.
I can easily see posts critical of Israel called antisemitic.