I’ve never been banned from Reddit but I was threatened with a ban by a Reddit admin when I reported a right wing troll group who was obviously using sockpuppets to harass people and spread racist bullshit in some local sub. The admin message said I was abusing the moderation system by reporting them and if I didn’t stop I would be banned from Reddit. I was never banned but a few weeks later all of the sockpuppet accounts I reported were banned by the antievil operations team along with one of the mods in that sub.