The technology exists already, small devices like that are used for example for tagging migrating birds and rare animals and tracking their paths. I'm more curi

The technology exists already, small devices like that are used for example for tagging migrating birds and rare animals and tracking their paths. I'm more curious about the social/usability issues, whether people would voluntarily give up their privacy for something like that. Anyway, I'm not going to implement it tommorrow, I'm just kicking around different ideas.