Umm.. 12' Caribe $4700. 15hp Mercury $2800.. The point is, These things cost money, and many people don't bother to lock them up. Its like leaving your car open, with the keys in it. No problem in a small town where you know everyone...

Ask any 'live-aboard cruiser' if they lock the tenders at the dock.. and 99% of them do. (Even to their boat at night, or lift it out of the water)

It is Sad that most places in the world are like this, but that's life.