Originally Posted by
ATOBTTR
I agree but what TSA should do and what their competence level will allow them to do are two different things. Like most other gov't agencies, they like to say "No" just because they can, and perhaps provide some lame excuse to go along with their "No" which has no basis in reality.
Except that in this case, they won't. As long as you have a boarding pass for that day at that airport, TSA policy is to allow you access to any checkpoint at that airport. At best, they may advise you that you're not at the correct checkpoint, but they will not deny you access.
This has been confirmed to be official policy by several TSA employees here on FT as well as a more official source (the TSA blog, IIRC).