I have the same problem even when I am a motorist. The sad reasoning behind this is that drivers don't know what the hell they are doing on the road. High beam, regular beams. All the same **** to them. My fix on in the car is probably going to be the same 'fix' on my bike. I high beam them back, but since I can't do that on a bike, strobe from my light it shall be.
Common enough curtsy right?