Firstly because there is a lotofthingstosee and to photograph (monuments, people, everyday scenes of life...) and secondly because mycameradoes notattract the attentionofthieves.
If you find someone has stolen your identity and used it to open charge accounts in your name and then run up a number of big-ticket items and failed to pay, take immediate action to set the record straight (see: " Seven Ways To Foil ID Thieves").