I guess I'm lucky in this department: I find bus drivers to be in general a more courteous bunch than car drivers. One morning had a sort of a race for a few km with a bus along deserted semi-major streets and a nice exchange with the driver and a few passengers at the end of the of the "race" (at a red light where our paths diverged). I won btw - hence urged the bus passengers to ride cause it's faster. I know I should really be trying to get cagers out of their cages, but then when they're stuck in traffic and see me pass them and disappear on the horizon... I think they get the idea.