eh dbzero is a shitty instance but I don't think they're all worth just banning or even defederating. They're silly idealistic libs but I don't think I have seen any vitriol or bigotry stemming from their users yet (I could, of course, be wrong).

Zuberi in particular has even come to mine and our defense in threads in other instances than both of ours so for that I do have some respect for them.