I agree. Only last week I heard a horrifying story of a women in a refuge who had kept her mobile phone with her so she could call friends, not knowing that the type of phone enabled people to track your whereabouts very precisely - her husband, who had attempted to kill her before and was still wanting to, was able to work out where she was - fortunately, the police were able to intervene and protect her before the worst happened, but it doesn't bear thinking about otherwise and she didn't even know her phone had this 'benefit'. Makes me wonder how many other people are being tracked/stalked without their knowledge.