And technically, I don't believe Punkbuster has to be on. An example: http://prntscr.com/fh6wws
But almost all servers have it on. I cannot imagine why any server would intentionally turn it off unless they have a clan full of players using cheats.
FroToe, check your PMs on Battlelog. We're having a bit of a technical difficulty with the PM system at the moment.
Never mind. We found proof of a Fair Fight reset on one of his accounts back in 2013, including a Punkbuster ban from 2013 as well in Battlefield 3. While we don't ban for Battlefield 3 bans, there's enough evidence here to conclusively show that this is endemic of someone who hasn't stop cheating.
Ban will be applied to his main account, and his alt account. Well done, Nadeko.
Thank you all for your help and your report @FroToe,
bans have been issued on all of his linked accounts!
/Closing the thread to prevent spam
~Nadeko