GPS is needed?

After I buy smart phone, I can't imagine without smartphone in my hand. That's why I always use my smart phone and search information. And GPS is used also. When I go strange place, I can use my smart phone google map, and put keyword, and search and check the place. But if I don't have smartphone, I can't find place easily. But if we think the other way, someone can use our information. And actually, indeed, some applications can use our information and use for some methods. For example, application use our inforamtion and inform our information to certain person. Of course, when emergency situation, it is very helpful, but when common situation, it is very not so good thing because of invasion of privacy. And most of people say, weakness of GPS is invasion of privacy. I think so. But GPS is very good material in our lives. Maybe no one can't argue with this sentence. And many companies use our GPS information for their business and advertisements something like that, so many people feel it is very annoying. I think GPS is keeping material for our advanced life and futre. Because we can use GPS we can so many things. And it is very important role indeed. But we have to use GPS morally, and we have to keep privacy each other. And government and companies or individuals must keep individuals information and they have not to abuse their information also.