While you won't be banned in Online for running mods only in GTA 5's single-player mode, it can be tricky disabling them. While Rockstar's official stance on single player modding is "okay so long as you don't mess with Online", the new and stricter rules made modding much more risky, even in single player. That said, there are a number of precautions you can take to further reduce the risk of getting slapped with a ban. We can only reiterate - these cases are very, very rare. With these things at stake, avoiding a false ban is something players are understandably interested in. The only thing untouched would be Shark Card cash since you bought that with real money. No matter how much you played, how high your rank was and how many rides you bought, upon the ban being lifted, you're back to rank 1, arriving as LSIA. Instead of simply being prevented from playing the game's Online portion for a few days, access is restricted for longer periods of time and all of your progress is wiped. The nature of the bans is also pretty damn strict. Trying to contact support because of a ban, be it false or no, will simply get you an auto-response and nothing more. All punishments are final, regardless of circumstance. A recent change in the ban policy of the game has introduced a new clause which prevents the appealing of bans. In the case of GTA Online, however, getting banned isn't that easy to escape.