Years ago, my parents worked with a lady that had an Airstream trailer. It was in the days of Macrame and she had several macrame objects hanging in the windows. They stored it at a "secure" storage lot. The went to prep it for a trip one weekend and it was gone. After a few months they gave up hope and took the insurance payout and bought a new trailer. Fast forward about 5 years. A news paper article comes out about a meth lab busted in the desert. It includes a picture of their air stream trailer, with the macrame items still hanging in the window.
I don't know about tear drops being stolen for meth labs, but a small trailer is easy to hide. Its easy to get replacement plate and change the ID#. I'm sure they could easily be sold or traded in, or used for years without anyone finding out. There are some phone apps that turn your old smart phone into a GPS tracking system.
Tom