As i think there is a place for something like that on Lemmy, after consulting with my co-admin, we just created a community like that:

!thunderdome@blackneon.net

This is a community especially designed as a place to fight, bash each other virtual head in rant, bitch and be creative in annoying others. You don't need to be respectful there, you don't need to be polite. As long as the user stays within the boundaries of the german law, well... go for it!