Last night at IAH around 20:00 the Pre- lane was already closed but there were three of these people still guarding the front of the security line.
I walked right past and one of them piped up and said "Sir can I see your boarding pass?"
"No, the precheck line is closed. There is only one place to go. You're not TSA."
"Sir, we still need to check no matter what!"
So this got my attention and I walked back to her - phone in pocket - and said, "I'll bite. Check for what."
"We need to check your boarding pass."
"For what exactly?"
"Sir, we are required to check your boarding pass. You can't get into line unless you show us your boarding pass."
I chuckled and turned and walked off and said, "No you don't."
She didn't follow me. :-D