Wintrading for Streamers has to stop

I just started getting back into GM NA SL and there is a player, lets call him "Biaco" (not his ign) who is continually win trading for streamers.

A player will "piss off" the streamer, and this guy will go into his chat and tell them how he will grief him for on his other accounts to get revenge for him. He will also straight up throw drafts for the streamer if he is on the opposing side. I have seen him do this countless times. This is guy is much worse than the "CashRed" griefing that plagued the NA server last year, in my opinion, because he's also killing the community of the game by spamming streamers chats with cringe stuff like this and making their communities feel like some kind of sad containment chamber for people who can't make friends in the real world unless they fork over money for attention.

I am not the first one to take note of this. I've had many people reach out to me about this player. If you're a streamer, please stop encouraging this particular player to ruin games. Everyone just wants to play the game, not be mired by wintrading players trying to get justice for their favorite streamers.