Say I want to stop people, once they have clicked one of my ads, from then seeing the ad for like 30 days. Is there a setting in Adwords to do this?
That would be nice if Google had a ban IP for "blank" amount of time feature. Maybe they will soon enough.
They should have frequency capping - I would think a lot of advertisers would have requested it. I know I have.
If Google wants to preserve its longterm growth, then it'll bend head over heels to prevent clickfraud. As long as its advertisers continue converting, they'll stay with AdWords indefinitely. Google has every incentive to stop and prevent clickfraud.