Sadly, I experienced dog-napping first hand about 25 years ago when my fiancee's german shephard "disappeared" from the yard. (she was a house dog, just out for a little air) We posted signs, checked everywhere for her. She was a very good dog, well bred. As we were walking out the door to go to our wedding at church, the phone rang and a man told us he worked at the pound an d a dog matching her description was there. We thanked him but had to go to our wedding (duh) and the next morning we called but they denied ever having her. The young man called several days later to check on his reward money, and couldn't believe it when we told him they said they didn't have her. He said "I know dogs and she was there!" We later heard that local dogs were disappearing from Ohio into neighboring states and being sold. We never saw her agin.
Several years later my friend's two goldens were also nabbed. There's alot of heartless people out there.