I don't have a problem with the government accessing the data per se. Given that the data exists and is commercially available, it would seem silly to tie their hands from accessing it. Police routinely run credit checks or just google people of interest to learn what is publicly known about them and I don't really have a problem with that. What I do have a problem with is that our privacy laws and culture are so lax that detailed location information has essentially become part of the public record of a person. It seems like one way or the other, governments will find avenues to get at that data if it exists, and if you don't want the government tracking people, better to cut the data off at the source.