[Kraken]

I would not believe what the TSA say 100%. As per the official statement, it's still at the officers discretion. Many of us have seen TSA officers on a power-trip as they know the nanosecond you say anything, you're either to the back of the queue or not flying.

In MCO I've seen passengers removed from the zig-zag queue after the passport / boarding pass check for muttering expletives about how slow the line was moving. Think they were just taken right to the back of the line as punishment for their words.