kemafi8752
Solid & Active Platinian
From what's been posted here, it seems like mod players only get banned if they're reported by another player during a multiplayer event (Full Marks or House Pride). Even if you yourself don't cheat, or even participate, during the event, if you're in a group and ANY player in your group is reported, ALL players in the group will get checked and banned if they're using the modded app.
The only way to guarantee not being banned is to not get sorted into a group during a multiplayer event. For Full Marks, this means not logging in at all while the event is running. For House Pride, you can log in and do other activities, as long as you don't earn enough House Points to get sorted into a group.
Besides these two events, as long as you don't do anything stupid like contact support yourself, you should be safe from bans.