Back to the subject of tailgating.
The other day, at around 100mph in the wet, some Audi or Skoda (those are two key tailgaters and 150mph drivers, ahead of the BMWs) was glued to my rear, so near, that I didn't even see his headlights anymore, merrily flashing away, while I was driving a speed that was adapted to the current traffic situation, and the traffic in front of me.
He kept flashing them, to the point where it started irritiating me - so I flashed back with the rear fog light. Not sure why, but apparenly this acknowledgement stopped him from further flashing, and he merely remained glued to my tail. until traffic cleared up sufficiently that I could pull over.
But no, I do not see a need to antagonize assholes. They're already demonstrating that they are assholes, and nothing I do will do anything but put myself at risk. But then, going slow on the left lane is actually a ticketable offense over here....