Yeah I mean I clearly have no medical need to carry on large tubes of flouridated toothpaste... I just thought that maybe this was a hole in the rules, and was more curious than anything to see if it would work. Perhaps not the most prudent of ideas to try to push the boundaries with TSA, but some of us are too curious for our own good...

Anyway, this might be too charitable (or wishful) an interpretation, but I imagined her to be playing along, smiling as she wrote the reply about requiring more than 3oz toothpaste for the duration of the flight. I suppose it's entirely possible she was rolling her eyes while scowling, too.