My wife and I didn't understand the tag thing, and had put our DSLR camera bag inside her carry on duffle bag. While in the airport (5 hour delay) we took the camera bag out. The guard checking bags at the gate before we boarded had a panic attack that the bag didn't have a tag. We offered to put it back in the other bag, but instead had to run back to the security check point and rescan it so it could have it's own tag...

The rest of the world's government run health care programs are welcome to do something too....