Vehicles are dangerous to other road users.

This evening I was riding my motorcycle over the mountain pass of Ou Kaapse Weg in Cape Town, when a Princeton vehicle marked "guarding" came roaring up behind me, following dangerously close behind me. His white rooftop lights were on, so I figured he must be responding to an emergency, and when it was safe, I let him pass. Despite being so pushy, he remained in front of me because of the other traffic going the same way. This is where I have the biggest problem. His rooftop bar lights were shining incredibly bright white LED's - brighter than a car's high beams, at eye level, and facing backwards. This is not only dangerous but also illegal in a number of ways - most importantly that white lights indicate oncoming headlights or reverse lights and should never be visible on a vehicle that is travelling away from you. Of course, if this was visibly a diffused white bar on top of the car like with other armed response services, that would be one thing, but these lights are two separate clusters of white LED's towards the outer edges of the car, just like headlights. This is confusing and dangerous to other traffic, and not only that, but it is incredibly dangerous for a motorist driving behind this vehicle, because one is permanently looking into a set of high beam headlights while driving on an incredibly dark, curvy mountain pass. I am very angry about this blatant disregard for other people's safety.