[nirui]

You can put the biggest warning on the phone, make it as annoying as possible. Then, the user sees the warning, as well as the fact that all the other people are ignoring the warning, click "Accept" 10 times and got surprised when someone comes to collect the testicle they just donated by themselves.

That's the same reason why desktop computer has so many malwares, that's why phones now has permission systems to restrict what an app can do on it.

If you want to create a system for everyone, including your 60 years old mom and her mom, you need similar of not better permission systems. Linux currently don't have that, and DON'T except an old fashion car mechanic will delicately configure AppArmor etc with his oily fingers in the middle of fixing a client's car.