Most problems Google (& DeepMind) have seen success in are not arms races; you're simply trying to accomplish a difficult task.
Dealing with bots, and content moderation in general, is an arms race. You're fighting another person who could be just as smart as you in developing evasion strategies as you are in countering them. Getting it right all of the time is impossible.
I'm not sure exactly what you mean by 'adversarial networks', it could be GANs or adversarial training.
Either way, yes, there are techniques for improving performance in the presence of an adversary but it doesn't negate the problem; anything you do will be countered eventually. Clever techniques only buy you more time before someone figures out a way around it.
