Similar idea:Spambot honeypot: A gambling and dating and college admission and ice type thread that instantly bans anyone that posts in it
Start a politics thread. State in the OP very clearly that anyone who posts in the thread gets banned. Leave the thread pinned. Maybe have trusted posters post like. 100 freebies before no one can post there ever so that's not TOO obvious.
Bonus: Keep messages up (unless they violate Smogon TOS) so by like post 100 you keep seeing [BANNED USER] [BANNED USER] [BANNED USER] like it's an episode of firebot

















