2 weekends ago, some squid on an R1 was trying to keep me from passing on a tight road in the mountains. I toyed with him for a bit, sitting on his rear wheel. Just when I was going to make my pass, the moron (in tennis shoes btw) runs wide in a turn, and clear off the road! He was lucky nothing was coming the other way! Anyway, I felt a little bad about it. Since then I just pass them right away to save them the agony of long term humiliation.
Man, this bike makes me a hooligan!