Well it doesn't annoy me, i actually think its a brilliant idea for the back wiper to come on. What annoys me is the fact that the wipers (which are more expensive than buying your own country) are about as useful as the rear end of rabbit sticking out of your hover!!!! The slightest bit of dirt on the windscreen and they just smear it across to the other side as well until you can't see the tree that you just hit, and you try and use the washers to get it off but they've already created there own small gravity field and pulled themselves out of alignment!! And i've even tried replacing the wipers thinking i might have had a duff pair . . . nope, still cant see any longer than 2 days after cleaning it!! I love my ST to bits and will never get rid of her but i can't stand that, any more than i can stand the constant rattles coming from every panel even though its only done 35000 miles!!