Even if you disagree with them, Trotskyists are not tankies, simple Marxists aren't tankies, leftists curious and exploring different theories aren't tankies, and ffs anarchists like myself are not tankies.
I feel like "tankie" indicated a very specific worldview at one time, but it's been used lately a lot to mean things like "doesn't agree with nations supporting oppression and inequity up to and including genocide" -- which is drastically at odds with how I've seen the term used in the past, no?
I've seen the most trolls, fascists, and even some Nazis (although I think they were really just trolls) come out of .world. Should we defederate from them too? If not, what's the difference?
If their moderation can't keep up with it and they become a Nazi bar, then yeah. For me, I have consistent experiences with .ml users in that the vocal ones support oppression of minorities up to and including atrocities, deny historical atrocities in a manner similar to antivaxers/flat earthers/etc, and generally smell like a creepy cult. If those are the users getting noticed, those are the representatives. If their mods condone that, then I don't think the problem is solvable on a per user level.