If you have OP I'd recommend you to do /whois <hisplayername>, copy his IP, geolocate it, brag about how you know where he lives and that you got 3 L33T hackers that can make things really bad for him and his server (sounds kinda skiddy, i know).
As said earlier, he's now your bitch, and you may leave his server and never think about it again
If you need someone to act like a L33T hacker for you, PM me, I'm a very good actor c:
Good luck.