so basically there's no VAC implemented in the game. But as far as i'm concerned, there's another anti-cheat system(LAC).
Also i believe that there's nobody banned yet. But be careful, use all trainers at your own risk. Don't hack too obvious, or edit your stats to unbelievable heights
for example, a lvl 10 could never have 10k kills and 5 deaths(shitty example but still).
But if someone reports you, the banchance is higher than the cheat will be dedected(As far as i know)