I would like to see some sort of website with information on how everyone can use these techniques locally, and tools share their experiences. As Joshua said, crows are everywhere. Anyone could do this. It seems like a relatively inexpensive hobby.
I used to have crows around my house alot and I'd try to trap them or shoot them with my bbgun or chase them or surprise them. But you can't they are too smart, looking back on it they were probably just playing with me. I've always been fascinated by them. A site like that would be great.