Here is what I think, based on years of research and having trained every anti-crow sleuth in this country and most of Mexico:
Nothing works.
https://www.growgardener.com/how-to-keep-crows-away/
https://www.stoppestinfo.com/402-how-to-get-rid-of-crows.html
The growers in Eastern Washington have tried everything.
For your conundrum, try the motion activated sprinkler.
What I wouldn't do is shoot them. If you are on a lake in Georgia, there will be crow lovers three docks over who will be all RWebb up in your business. Trust me.