Here in AZ, the DPS has taken to setting up roving check points. If you drive by and don't stop they pull you over and bring you back to the check point and then they proceede to stick your tank. They get really cranky with all the farmers here in Yuma cuz 99.9% of them have a service tank for their equipment. Some just happen to have it plumbed into the fuel system with a shut off. Sometimes the DPS can be cool about it. Some have talked their way out of a ticket by saying that they had run out in the field and use some farm fuel just to get back to the station. But most of the time you get a "Yea Right, you just happen to run out uh?"
I agree with WD40, it is just not worth the hassle anymore.