This is terrifying, I had no idea this kind of practice is already in place! In Asia, so far I never got asked for my phone and equipment, but now I wonder what the best way is to handle this. Killing my phone and restoring after entering is one way, but for a laptop that's more annoying unless you live in the cloud. Might still be a good practice to have your devices in a state where you could easily wipe and restore them in no time.

If I randomly got asked to do that, to be honest, I would rather turn around and go back instead of taking the risk that they maybe find something out of my past that can get me intro troubles.