I was reading up on some of the conspiracy theories about this game. They are pretty scary, but not that much more than anything else with your phone that you could easily get worked up about.
Still, it's bizarre that this game could very easily be used to track almost the entire population of developed countries, as well as collect images from all over the world on a scale bigger than Google Street View, including inside houses and buildings.
I'm sure I'll still play it when it comes out, but I'll try to limit the information my phone provides when I'm not playing.