Rather than corporations misusing data,Must be the profile pic
You can take certain precautions. The camera isn't really a big issue since it doesn't record unless your device is hacked. But your phone right now is listening to you. I don't know if you speak Spanish or have Spanish speakers in your house or not. If you don't put your phone next to a radio on a Spanish channel for a few hours and see if you start getting adds in Spanish. For extra fun turn off all your apps.
Also there are google searches that will automatically put you on a watch list. There are google searches that you can do from the privacy of your own home on your own computer that can put you on the "no fly list" which will inhibit you from traveling. You won't be notified you are on this list until you try to board a plane. Now as much as these searches are super ****ed up and those people probably deserve to be on a no fly list I still don't like the idea of the government knowing exactly what you do online at any given moment and we have no power to stop this. And again equally for corporations since they will misuse this information the moment it is profitable.
I see government's greater power as the
greater threat.