Never experienced this part, but it seems that as players have done open world roleplay, do they drive in actual rules established there or if they don't, accept the punishments coming from the "polices" there? If they do that and roleplaying being something players like to do (a reason players want everyday cars), it seems contradictory to those that claim rule free roam as boring...
And for free roam to be implemented, I think actually polices like that (I know they had M4 Safety car, etc.) is the last thing that I would think for GT's, not even some other wild free roam games have polices, unlike NFS. Driving recklessly is bad, violating polices are even worse.