The problem with that is that accusations will be raised (sometimes true, sometimes not) that officers were arresting people for DWB.
That being said, I think the solution is for police cars to be equipped with video cameras. If there is probable cause for pulling someone over, jurors would be able to see that. And if there isn't, jurors would be able to see that.
I think video cameras in police cars is a good idea for a lot of reasons.