TL;DR version: The "dystopian future has really arrived" because the US Supreme court disagrees with you.
your own house and garden suddenly become public places where your asshole neighbor can film you and your children
It's not happening suddenly. It happened twenty years ago.
Annoying people is sometimes illegal, sometimes not, but the law doesn't (and shouldn't) consider using "shitty tech gadgets" any worse than lawnmowers, drums, or a ladder. At the same time, the US has strong legal protection for people who want to take pictures, videos or otherwise gather information. You can't make it generally illegal do those things without infringing on the freedom of the press.
All the discussion about drones specifically is due to the human tendency to see actions as being tied to tools. It is the same fallacy that drives laws to be disproportionate where a crime is done "with a computer." Even if you get laws to protect your privacy in your back yard "from drones," you will still have your privacy invaded completely legally by people with actual airplanes, or ladders, or model airplanes, or mini-blimps.
The core issue is defining what the law should treat as your right to privacy. (Not what tools people might use to infringe on it.) So far, the courts have determined that you have property rights extending about to shotgun height above your property and you have the right to privacy where you are not visible or try to keep yourself from being visible from public property. (The air above your backyard is public property at sufficient altitude.) For example, it's perfectly legal to take pictures of your neighbors if they're in front of an open window (or their backyard.) It's illegal to take the same picture if they have blinds on their windows which are failing to actually hide the people on the other side. (Indeed, you in some states, even being naked at home in front of an open window is illegal.