No, he didn't say "I joined a CP discord group," he said it was a discord group. To use your subreddit analogy, if you join a subreddit called like r/gaming or some shit where they post about games, and someone posts CP anytime after the date you joined, you should be banned even if you didn't open the app that day.

I'm not giving you the benefit of the doubt either, for all I know you're on c/CP which I didn't know existed, and I could be banned for arguing you here. Maybe I should block/report you just to be safe, hmm? Idfk what comms exist on Lenis . org or whatever your server is, sounds sketch tbh..