1. The study of wildlife migration patterns has been a thing for a long time. Methods exist, and are always being improved upon with better technology. A well-placed hunting camera could do the same thing without all the trendy Bay-Area BS.
2. I'm pretty sure that if (when?) a company develops drone-powered mass-surveillance technology, they will be doing it for someone other than ranchers.
3. This whole thing is really a non-issue. Individual wolf packs kill few cattle per year, and there are a lot of published papers with similar numbers. In fact, the removal costs of the wolves can exceed the potential lost profits.