Find me a crosswind at 500’agl less than 10 knots? Maybe 5:00AM to 9:00AM, but not likely?
Electronic jamming? Surely there are a few geeks out there that could build those.
I have no idea where you got your "10 knot crosswind" thing, but here's a drone from DJI that has a top speed of 45 mph and a 30 minute endurance.