Depends really. If you are in a city, or unincorporated area, and what the existing laws are. In most cases, you are within your rights to destroy it, or seize it. Personally, I'm not a big fan of ticking off the neighbors, so I'd just follow it back to the source, and then have a conversation. (with the knowledge that any repeat of the action WILL result in the destruction of said drone, regardless of the law, to be honest). Just out of principle. The worst one would see is me and the wife naked in the pool (when it was up). Not that I'd care much, but she would, and nobody wants to see us anyhow....lol. Given the locked fences, and position of the pool, a drone is pretty much the only way you'd even see it.