Social media does not only spread bad ideas, but degrades the symbolic machinery people use to form ideas in the first place. It trains reflexes where thought should be. There is no symbolic lattice for things to land and it turns people into reactive zombies.
Everyone has some economic game going on. If some entity can see most of the cards you hold, it like putting your cards open on the table during a poker game. That is why big companies want your data, they want to peek at the cards of as much players in the game as possible.
A simple WIFI/bluetooth only device like the iPod Touch but with Linux, combined with a modem puck would actually be enough. You separate the untrusted part from your own device.