When I was playing before there was a kid named D I C K S U C K E R, in bold red letters, now i'm guessing its the same annoying european whos name is C O C K F O N D L E R. All the kid does is grab flags and spam them, and you can't ignore that, or he does the glitch to switch teams and then kills his team with nades or hides on purpose when the other team has flag so they can keep capping.
I don't play pubs much but when I do this kid is always messing around in supermans, It was from like 3:30 today till 3:50 you should look in the logs and get this kids ip since I can't.
I forgot that pubs don't record demos so darn, but yeah you should be able to find his ip around that time in your server Superman.