I've experienced this at the Doubletree Airport TPA. I probably caused it as I spent 100 nights there on our company rate Our corp rate at that location is fantastic. A friend of mine was at Hertz recently and they were checking corporate identification. It may be hit or miss, but I now expect to show my company or government badge. I keep them in my backpack in the first pocket so I can quickly give them to the CSR.

I'm sure the Internet and all the sharing of corp rate codes has caused some hotel properties to have a lower ADR.