while traveling ewr-las this summer i was asked, at the gate by a tso, if he could see my camera bag. i was talking on the phone and responded with a polite "no". the guy looked at me funny and didnt say another word. i went on my way. my 2 part question is...

1. why am i being bothered at the gate after being screened already?
2. if i was trying to hide something shouldnt the guy have been a little more firm when i told him to f off?