I've joined an last FM event and reported some player, and nothing happened to my account. but in this event, I'm not joined it. because I'll play safe with avoiding FM and HP event. considering I'm too lazy to repeat game from the beginning. i assumed i'm just lucky xDahh i see...thanks a lot for answering my question!! I will give an update later if my account gets banned or not.
Once again, thank you so much!