No, no no! You have to let them overtake you to begin with; then power past them on the next straight as if they weren't there. Then, slow down, and do it all over again so they know it was no fluke!
Leastways, that how I used to do it, when barrelling along country roads in Portugal. Golf GTi's in particular were always game for a laugh then
Mind you, I was in the M5 then...
Well, I can always dream, though I have to say my 160hp tourer diesel is fast enough for now... As my old father-in-law used to say, he aimed to be the oldest on the road, not the fastest!