Of course, such ads are not exactly novel or out of bounds -- but they might require some minor vetting:
Jason Clausen, a Mason City, Iowa, man featured in Mitt Romney's new video featuring unemployed people has a lengthy rap sheet and served ten days in jail for "assault on a peace officer," public records show...Some of these like seatbelts and possibly speeding are exceedingly minor. But as criminal background checks are common place (and Mason City is not exactly New York or Chicago) a guy with an assault against the police is not exactly a strong candidate to make it past a conditional offer.
The records show Clausen had nearly 20 busts, tickets or fines, a number of them traffic infractions related to things like driving while intoxicated, or with a suspended license. Some were related to accidents, others to driving without seat belts.