Probably, but it would "trash which "cohort" Google thinks I belong in"; there's really no reason to fool Google into putting you into a specific cohort as opposed to just a random/"broken" one; either way, your true cohort is obscured.

Unless you were studying the impact of ads you receive based on cohort, like https://their.tube.

I remember reading about it on here a while ago and some Googler said that it was easily identified as automated clicking on their end, they have pretty sophisticated antifraud systems.