Recently got banned myself. Guilty of having used it in the multiplayer tab on custom games to get certain achievements vs ai.
never received warnings of any sort, all of a sudden couldn't log in anymore, stating my account was permanently closed. Strangest thing was that at this point i hadn't used the trainer in at least (half) a week before this occurred.
Currently trying to get a second chance, stating i never received warnings, nor did i interrupt the online balance and fairness.