[Porsche-O-Phile]

Call 911/PD. Definitely.

Normally I'd give someone just driving quickly the benefit of the doubt (maybe they're having chest pains and trying to get to a hospital, or have a pregnant woman on board who's in labor, or maybe someone who needs medical attention urgently, etc.) However, there's a difference between someone just trying to go quickly and get around traffic and someone who's driving super aggressively (i.e. like a douchebag) and clearly is just treating the road as his own personal raceway with no care/concern for himself or anyone else on it. It's a bit of a judgement call but if I see someone simply going fast up the left lane I let it go. If I see someone going fast making lane-to-lane changes to get around traffic it depends. If it's someone clearly just being a dick (whipping in/out of lanes for no reason, tailgating when there's room to pass, etc.) then I'll definitely call 911. I've done it before too.