That will do more harm than good. In order to build such a device the feature would need to be advertised, which TSA can see just like everyone else. Then when

That will do more harm than good. In order to build such a device the feature would need to be advertised, which TSA can see just like everyone else. Then when they see such a device, it becomes incumbent on you to prove you’re not using the feature, even when you’re not using it. So you can never prove you’re not using it and therefor could be detained. You might think you have more rights if you’re in the US, but there are many regimes where you don’t have them. Also: https://xkcd.com/538/ https://xkcd.com/538/