All I can say is I can hear the comments from other passengers in line, and I wonder how many will try to follow suit. I bet many passengers will see a Medallion member bypass the line and get checked in through the Breezeway, so they will break out of line and try it. Probably will face a cold reality if they aren't qualified to use the Breezeway.

I saw these in Atlanta during my last flight, but didn't know what they were for. It didn't matter though. I was zone 1 on a free upgrade anyhow.