as for your friend getting a ticket test driving a vehical he is screwed unless you can prove he was test driving it thinkin about buying it...that one might be fightable....as for a cop sitting and waitin for someone if he does it enough just call his superior and tell them about the harassment...also bring it up in court if he has busted you numerous times....there is a limit to what a cop can do and yes they do get in trouble for harassment...i have seen it done before nothing new...good luck with it all