I have been banned pre-emptively from subreddits for making comments in other subreddits. The the sad part was my involvement in those toxic community's was to get them to see the other side in a reasonable way. If anyone had actually read the comment there would not have been a ban. I even appealed the ban and they told me I shouldn't even be there and it doesn't matter. Talk about being close minded and toxic!
(It was left wing subreddits banning me for arguing with right wingers in their own spaces, but I did in a soft way that didn't get me outright banned - it showed me that the left wing extreme groups are just as bad as the right - extremism needs to end full stop)
The fact that behavior was allowed on reddit should have been a red flag a long time ago.
I got banned from there too because I used to go on /r/4chan back in 2011. I was an edgy teenager back then.
They apparently fetched every comment that had ever been made to that subreddit and banned everyone. It happened in like 2015-2016, long after I stopped going on any subreddit like that.
It's something of a reddit truism that nearly all the subs that ban you for posting elsewhere are either lefty subs or subs that are run by mods who also mod lefty subs.
Most right wing, incel, etc, etc anyone else you're likely to challenge subs actually require you to break their rules, and most of the time unless you're outright obnoxious about it will let downvotes and debate do the work. Except for r/conservative, who is fiercely defensive of their bubble.
Yeah, I got banned for posting in a Joe Rogan subreddit, and as OP was saying, I was calling out toxic viewpoints with a dissertation on how machio and toxic behavior can be destructive to friends and family. I was insta banned from the justiceserved within minutes. I laughed, shrugged and moved on
I had similar experiences, and couldn't understand why they would discourage dialog and discussion around various issues. The thing is, they don't actually want dialog, they want to stamp out opposition to their views as though it never existed.