I never slow down, or do anything to hinder them, if I cant pull over then I just drive normally until I can pull over safely.
although once in my old red nova turbo I had them behind me on an a road with no turnings off of it, not enough room to pull over and too many cars for them to overtake really, so I just booted it off to get out of their way, I figured if they are doing something important enough to have the blues on they are too busy to do me for speeding anyway