[ryandamm]

Yeah, but GPS isn't a handshake, and most commodity drones rely on it. You can't take it over, but you can probably blind it.

[mhowland]

It's been spoofable (and jamable) for some time...but serious PIA to do and a huge FCC no-no as it's tough to focus.

http://news.utexas.edu/2013/07/29/ut-austin-researchers-succ...

[run4yourlives2]

Do you really need GPS to tell the drone, "Remember your flight control inputs and reverse them on loss of signal?"

I'm sure it's not trivial, but drone defence based completely on signal interception seems straightforward to defeat.

[WalterSear]

Iran claims to have captured drones by spoofing the GPS.