I think insurance companies tracking your whereabouts is a very very bad thing, but I think them tracking how safe you drive is a very good thing. If it makes drivers drive safer to save money, and thus makes the roads safer for everyone, I can't imagine this to be a bad thing. These devices can also fine tune your premiums. They track how often you drive (drivers who drive less pay less, which makes sense, someone who drives 5,000 miles a year is less likely to get into an accident than someone who drives 20,000 miles a year).