While shopping at Seaway Sales this AM I noticed a box of hand-pump air horns suitable for annoying people at parties, but also according to store clerks very effective at moving crows.
I was told they use the plastic horn to effectively shoo the crows away and it works....
While a three dollar solution isn't what we in government are all about, I would recommend trying one of these first to see if it is effective in your case. There is no program to buy one for you, but I know lawmakers who would propose the legislation.
It's less expensive than propane cannons, which would be my next step if the crows were bugging me.