I'd likely delete all comments or threads with threats, hate speech, or incitement to violence.  Those kinda cross the line from free speech into infringing on others' rights.  I'd forward those posts to the main mods for penalties if that stuff pops back up. Freedom of speech is not without its boundaries. As a mod you have some duty to make sure people don't use their individual freedoms to infringe upon the rights and well-being of others.