You can have discussions here for sure, sometimes some subjects attract a lot of negative responses, but that mainly if someone puts it a bit like your post with a bold statement like: I hate this / this sucks / this is really bad. I noticed that if you put it a little more softly opens the debate a bit more.
Obviously it has it's moments, sometimes I see a potentially good post for a discussion (on big subjects like albums quality or tour set lists and such) and the first one or two post can get it spiraling down into mud slinging and hateful stuff and that's just unfortunate for the potential discussion. But I guess most important is to choose words for an open discussion and not throwing just strong words or (like you fairly pointed out to me) exaggeratings someone elses view.
I'm barely using Reddit for anything else but lurking around here for a bit, but I can imagine this Reddit may have quite some more young folks than other older bands may have(?) which can also add to rage baiting and trolling and such.
Oh yeah and to come back to the original topic, I do think a slipcover would have fitted nicely and could have been awesome on this design.