It simple :
1. Play STORY EVENT, CATHEDRAL ONLY
2. NEVER EVER TRY playing RANKING EVENT, FLOOR EVENT, ORDINAL BATTLE nor WOU
I know this is suck but bandai wont hammering you if stay away from multiplayer related event like that. Wanna play all event without gettimg banned ? Just pay using playstore then create new account to startover.
No, bamco only banned if you got reported on multiplayer related event. Dont underestimate if there is possibility some players reporting all account on their bracket in every event. Once you use mod your account flagged already then just waiting someone reporting you. But if you never play that mtiplayer event then they dont know your existence and bamco wont hunt you.
Btw anyone here using other emulator other than ldplayer ? Recently i can no longer login because always crashed when tried into game after welcome screen.