- Privacy. Just the thought of a service knowing my child's whereabouts at all times or their historical data being in "the cloud" will probably give some people pause.
- Having a locked bracelet/anklet on anyone immediately makes me think of house arrest/imprisonment/sci-fi movies. I know that sounds silly, but it did enter my head.
- I live in a very safe city (Bend, OR). Maybe it's different in urban areas, but really ... how many people would say "I feel like my neighborhood is unsafe"
- Furthermore, of those who live in an unsafe city and need this service, most of them probably can't afford it
- How the heck is a bracelet going to prevent a babysitter from hitting my child?