On our sub, you pretty much get banned for incivility, bot activity, and the like. We purposely welcome disagreement provided it's constructive and civil.
Now, post removals, we do a lot more of. We do try to moderate the sub such that it has an open, positive vibe in line with it's stated purpose.
I do fully understand what you're saying though. I've been banned for everything from merely asking that a sub enforce it's rules consistently, to asking for sources, to even posting in a particular collection of subs that another sub found objectionable. You have to run pretty far afoul of reddits sitewide rules as a mod to be removed from the position. That's why you see so many thing2 or thingNoCensor subs on subreddit maps.
Now, post removals, we do a lot more of. We do try to moderate the sub such that it has an open, positive vibe in line with it's stated purpose.
I do fully understand what you're saying though. I've been banned for everything from merely asking that a sub enforce it's rules consistently, to asking for sources, to even posting in a particular collection of subs that another sub found objectionable. You have to run pretty far afoul of reddits sitewide rules as a mod to be removed from the position. That's why you see so many thing2 or thingNoCensor subs on subreddit maps.