Oh, get off your moral high-horse. I'm sure you've never been over 70 in your "Cosworth"?! 
Why I can't condone speeding in residential/school areas etc, ie 60 in a 20 (sorry, Linz - Although i know you've learnt your lesson
), there are some quiet & safe stretches of dual carriageways where I can't see it being THAT much of a problem, TBH (within reason, of course). If the other person starts being stupid/dangerous etc, then just back off & leave them to it.Just my 2p.
you said it!

im not trying to be all moral, im far from perfect.
it just pisses me off when people make stupid claims, only way you can nail someone for real is on a track or the 1/4 mile. just annoys me when people talk crap with out being able to properly prove it!