they are really lucky because the jokes were about my friend. 

People: *repetitive sexual jokes about friend despite her request to stop*
Me: I know for a fact i am the oldest and strongest amongst us, so stop now because i am in a really piss poor mood right now.
Friend: It's not a big deal they'll stop eventually (or something like that... was really focused on other things)
People: *Keep going*
Me: That's it going to kill them.
Friend: *tells me something to not beat shit out of people despite reoccurring events*

This.... happens a lot. For the most part I haven't any form of anger issues for like ten years. Except in these kinds of situations. Then i am all for scaring the shit out of people.