Is it Normal

gsxr750

The real reason someone came down and took pictures of your car was to add it to a list of prospective cars to steal, in a thieves data base for easy cars to steal.

Basically they take a picture of the car, note year make model, note exactly where its parked, location date and time. For when they get an order to steal one, like yours.

This is why its never really good to leave your car parked out in one location for a long amount of time.