Dillemma, and legit question of ethics.

[Dustytome]

I would turn a blind eye for sure. You can't judge people and take the law in your hands with only suspicions and no actual proofs. Also I value the real world friendship more than a digital game. I would however secretly wish that someone else would report him (without my involvement at all) or GMs detect him and punish him.

You're not taking the law into your own hands. You're requesting the GMs to look into the matter. They're not going to take your word on it and ban them on the spot. If anything happens it'll probably be upwards of a month later. I would confront said person, tell them to stop. If they persist, report them and what happens beyond that up to the GMs and on said person for breaking the terms. Everyone knows botting is against the terms they agreed to and there's no excuse for it.