[avereveard]

you cannot just use a dumb trasponder duh, imagine people being able to cause a mess with 100$ hardware

you need some form of authentication on it. needs to be impossible or at least very hard to spoof.

and now your device is not so dumb anymore.

[jayGlow]

you could just make spoofing it a felony like using any other emergency protocols are.

[NoZebra120vClip]

And you could offer a $5,000 reward, plus legal fees, for everyone who uses it and gets caught