Phones? Yeah 100%. And everyone has one so even if you try to deal with your own, others do not and there goes all your effort out the window. Pair it with even the most basic video surveillance and it literally has everything about you. Your habits, your locations, your contacts, all communications, hell it probably can even tell how fast you run, what you eat and what your preferred shows are. It even has a nice little camera to look at your face each time you check your phone.