The problem I have with bikers around me is that they never use the bicycle lane of the road and insist on riding in the car lanes (there is a reason that the municipalities spent the money to widen the roads in order to accommodate you assholes, so use it!). They then proceed to get [censored]ed at you when you pass by them too closely while trying to get around them in your car.
And the fact that they do not adhere to traffic laws at intersections is a problem, as well.
I like to go biking, but I don't act like I own the freakin' road while I am riding.