(adsbygoogle = window.adsbygoogle || []).push({}); i host xp lobbies on advanced warfare and i was wondering how do i stop people getting reset?

you can't.
it's by "Luck"

supposly unlock all does not reset

Changing prestige and stats is what gets people reset, I have had many modded accounts now. Everyone that has had Prestige and or stats changed has been reset. Accounts with only unlock and modded classes have not been reset.