I go for "kys," "kill yourself," or "kill you are self" most frequently. I also enjoy "become an hero" and the classic "join the 41%" and "your parents will use your real name when they bury you" for troons.
My absolute favorite is to actually start singing Bo Burnham's "Kill Yourself," but you can only do that one if you're telling people to become an hero in person or over VC.
You dumb shits just fell into the most obvious honeypot of all time, now watch as all these phrases get immediately picked up on by the big tech companies writing auto-ban bots lmao