New drones being sold in the USA are equipped with something called remote ID. In theory, it enables law enforcement to wirelessly identity the drone, who it’s registered with, and where the pilot is standing. This is very new though, and very few, if any, police departments have the tools needed to make use of it. It’s also possible to read remote ID from phones, but without the database, it only gives you so much info. Owners of older drones are supposed to attach a remote ID module to them in order to maintain legal flying, but someone being voyeuristic with their older drone probably isn’t following the rules.

Not in the US. You can report it to the police and the FAA, but it’s a federal felony offense to shoot down any aircraft, regardless of whether it’s a $100 drone or multi-million dollar full on airplane. But like the other poster said, voyeurism and harassment laws still apply. And also, if the pilot is out of sight of the drone, that’s a hefty FAA violation (assuming they don’t have a specific FAA waiver that’s hard to get) and something you can report.

FAA Certified drone pilot in the USA here. That’s wild. In the US it’s illegal to shoot down an aircraft of any sort no matter the type or who is flying it. And also, the Federal Aviation Administration is the only authority in the US when it comes to airspace, and as long as you have authorization from the FAA or are in uncontrolled space, you can fly over anyone’s property. However, that doesn’t give you the right to voyeurism or harassment. If you are intentionally spying on things that are normally considered private (peeking in a window, for instance) or repeatedly or specifically bugging a specific individual or family, then you can still be charged with those crimes. Also, unless you have a specific waiver that’s rather hard to get, you have to be within line of sight of your drone. If the drone pilot is not following the rules, they can be hit with hefty fines. Even though drones can be bought easily, there’s still strict rules that the FAA has for both recreational and professional flying, and anyone operating a drone outside those can and should be reported.