The FAA fined someone for flying "for hire" but that was thrown out by a low level judge. Currently being appealed.
No action yet from my understanding by the FAA on anyone else flying those things.
Yes it's dangerous. IMO it's probably best handled by local authorities as some sort of public endangerment charge IMO at this point.
In their defense, look at how many birds are out flying, and we hit a very few number of them except for t/o and landing. I've only hit one bird outside of final and that was in a decent about 10 miles from the field.
The technology involved with this stuff is pretty neat IMO.