It isn't? Someone in the MCO told me it was and I thought they even quoted the HTA at the time. They always make it a point to tell us to remove our numbers before heading for lunch or anything.
Don't be using your fancy-pants names on me, mister. What's an MCO?
It may be illegal but I can't find anything. See if you can get some details 'cause now I'm curious. But keep in mind that even if it's not illegal it may still draw some attention from two types of cops....Those being the ones like me that want to look at your cars and the 'other' type that will give you a hard time.