You right

I remember a few people got caught for hiring a hit man at hireahitman.com (or something equally on the nose and obvious).

In that case, at least, law enforcement set up the website

Automod to remove every post for inciting violence.

Alternatively, requiring posts to include “Luigi”, removing any that don’t, and have reddit remove the rest

It would be kind of funny if, in protest, mods set automod to remove every post for inciting violence