How to tell someone is using a hack, Speed hack only though if your character voices are pitched during a pvp match(Slightly higher than normal) That person was using a speed hack. Now. This seems to stay after pvp match cartmen and butters both will have a pitched tone in shop. Seems to go away if you close out game and restart. But mark there name and report them. Good luck guys.

DoggieTheKid

Note: After you write down the name restart the game shout put voice back to normal