Pretty paranoid. Is that really a concern? Just because something is possible or some minute percentage is doing it, does not mean it should really concern you. There is a chance you will get struck by lightning or get zapped from errant telecom microwave transmissions, but it does not mean we should all be wearing tinfoil hats. Again, lets separate 'what could be' from real concerns of risk.
If you really believed the random pervs at the mall may have button cameras or are recording on their cell phones, do you avoid all public places? Probably not. Which means your assessment of the risk (risk of impact) is not sufficient to change your behaviors.
And lets take the Stingray equipment, not that I agree with the practice, but does it really matter to you and I? Those things are crazy expensive, so they don't deploy them all that often. And if you were the police, with limited resources, would you use them on active investigations of criminals or just set one up to browse who people are calling? (doesn't listen to the conversation) Really? Out of all the risks in my day, getting in my car is probably the highest, this does not even rank. I doubt they care anymore than tracking what color shoes I wear.
I am not saying privacy is not being abused, but again we must define like anything else, what is an acceptable risk. Just like getting into my car, drinking scotch, smoking a cigar. Huge risk of getting killed, in comparison to other activities, but I do it anyways knowing and accepting the risk. Same situation here. Screaming that malls and public places are ripe with privacy violations is just as crazy as saying some spy agency is interested in knowing the type of underwear you buy. They could find out if they wanted, but the simple fact is THEY DON'T CARE!