I've played safegaurd alone with this extinction trainer by the-crow. Unlimited hp and ammo works good for that (but watch out, you die when a person with riot shield comes n hits you)
Not sure if the other extinction trainers work, but should most probably..
I played when the trainer was released, and no ban yet. So I'm guessing there's a less chance .... but still there is some chance of ban.. good luck!