In the defence of driver, motorbikes turn up in some godforsaken areas, especially on motorways, a mate of mine knocked over a biker (not too badly)on a motorway once when i was in the car.
Basically he was stuck in traffic in the middle lane and a lorry to his left was doin its best to muscle in to get out of the perma stationary left-lane. He got so close to my mates car that it was only his reaction to pull forward and right that stopped the trailer crushing into his bonnet.
Now on a normal day this would be merely a reason to hate truck drivers. However this particular time a motorcyclist had pulled along the right side and stopped. He got pretty banged up.
The point is he shouldnt have been there, he should have been queing like everyone else and i have no sympathy for him in the same way i have no sympathy for drivers forced off the road when traffic dodging on the hard sholder. I watch out for bikes all the time, but i dont know if id have seen the one my mate hit either.