no, sometimes people suck and deserve to have their sentiment downvoted - at least on a site where voting has to exist

on proper forums where there is no voting, there are better ways to discourage behavior, like just ignoring the user / posts. but if the buttons are there you want to click them

I like it today. Depends on how judicious mods are with bans. If there’s a genuine threat of being banned for not be(e)ing nice, it may not matter. That said, I think that if these communities ever reach the size of something like Reddit, downvotes may actually have a place.

No. Downvotes aren’t nothing more than gauge of the specific place climate anyway. Disabling them always looks for me like cheap try of enforcing positivity and openness in places where there is problem with it. Downvotes also help people find their own interests communities.