Okay, maybe I'm getting a little too carried away on this. But would there be any way to mount the plate holder with a couple of screws from the underneath? Why? So when you get a ticket, you re-mount the holder back on, have the ticket signed off, and then be able to remove the holder and have no holes in the front of the bumper.
I think this would be a cool idea. But there is a line you cross that changes from something cool to something too rediculous to bother on.