A school that banned snoop-phones on campus found that this made life and education much better. Most of the students agree.

Alas, they are still being tracked, and perhaps listened to, by the non-"smart" portable phones that they carry. These phones are likewise running nonfree software that the user can't change _but others can_.

Still, this is a big step forward. If you can take that big step, you can probably take the smaller step that remains.