I made something just like this that worked on forums. Basically any forum that was using the tapatalk plugin (pretty much any busy forum uses it these days) you could subscribe too. It doesn't look like this will handle mispellings of works, or anything like that. I was handling that, however it took a LOT of processing power and quickly realized that the more people used it, the more it wasn't going to scale really well. Good luck with your project.
I have a dji drone, even if you break the wifi connection, it will just return to "home". Unless you can spoof a gps signal, I don't know how you'd capture it.