Why would you need to break the rules to stop them? If they repeatedly run people over or try to, you can initiate on them. Chances are they fuck up their tires, drive slow enough for you to realisticly be heard from inside the vehicle, while shouting and pointing your weapon at them. If they don't stop, i wouldn't even stop at shooting their tires. If your initiation is good enough, just straight up murder them. At least that is what I would do, but I'm no authority here ofcourse xD. It all comes down to roleplay isn't it.. If you are armed with a weapon and your character doesn't mind violence, why would it be bad RP or breaking rules if you first threaten the fuck out of the driver of a slow driving car that has left a clear rampage in it's wake and to then kill the driver for not complying to the threats or demands to stop =). I don't think not being hurt because of VDM script is a excuse to let it go from an RP point of view. Someone still drove people over. Actions -> Consequence.
Also, if it's in a greenzone, you just step inside the bar and get off the road. Nothing more you can do. Have a cold one =).