Happens all the time here
just tell them to bugger off....
shout loudly in Arabic/English or if they dont bugger off throw a little stone and chip the windshield.... LOL

I made the mistake the other day.... coming out of parking space at Villagio - with my hand i just gestured to another driver to go into my space...

he thought that was it and followed me all the way home...
I thought it was hilarious.... how could that have been possibly construed as 'i think yr hot lets shag now'?????...saddo

Dont get sad - get mad! thats fun :)