The LocationSmart web site enabled anyone to roughly track the position of any mobile phone, due to completely missing security.

However, anyone willing to commit a crime can get the same data through the bad security of the SS7 protocol through which one phone network talks with another phone network.

Even worse, the data is easily available the government.

This is one reason I refuse to carry a mobile phone. The other is that it can be modified through a back door to listen and transmit all conversations in its vicinity.