I don't think I'd dare comment on anything politics, religion, environment, current events on Reddit post API change
I go there for about five special interest subs and I try to not be logged in when I want to look up something else there, to curb my tendency to reply
So that's the position current implementation of rules of Reddit and subs have scared me into. It's a bit of a police state, with big sub mods as secret police
Mods can ban you from communities, cancel any of your posts, delete any of your comments. That's about it.
The trouble is that people are unfairly banned from subs they have followed and contributed to for years and there is no appeal other than begging the guy who just maliciously kicked you out
That's not counting mods who are also admins and mods who are good friends with an admin. You can get a site wide ban for saying the wrong thing in front of one of them