Loudoun county school bus drivers, my biggest bicycling safety concern

A generic picture of a school bus.    Normally when you see a school bus on the road you usually quitely remember the times of your youth spent riding in school buses.  Or at least I used to think these things.  Now that I bicycle everywhere that I used to drive to, when I see a school bus I start emergency planning.  You see the only drivers that have ever come close to endangering my life are public school bus drivers.  They consistently pass when it is dangerous to do so and have run me off the road a half dozen times already.  I've even had one driver try to tell me it was OK that she ran me off the road because  I was moving to slow (the fact that I was 100 yards from a red light didn't seem to matter). 

    Now this bothers me for several reasons.  First off this means that a public institution is creating my biggest daily safety concern.  And secondly, how the hell are school bus drivers getting their jobs without knowing how to deal with slower vehicles!  I mean you would think that a job as resoponsible as shuttling our children would require that they have an above average knowledge of the laws.

Anyway, I complained, and hopefully it's not just going to fall down an administrative black hole.