Greetings,
I would hunt them if I could find a place to do it. If you haven't already done so, checkout
http://www.crowbusters.com
Sourse for flying crow-decoy kite anyone? Inflatable grounded crow decoy? Lots of good info and experience there. Check out the hate mail they receive from crow-huggers. Oh, and don't forget your shotgun for the airborne crows.
Regards.