I agree with your position. However, you don't want to be one of the unfortunates that is jerked out of line by TSA. We were coming back from Cabo San Lucas a couple years ago and my better half's ticket was marked with an "S". As we boarded the plane, a Mexican security agent pulled my wife aside and did a secondary security check--no problem, we understood the necessity although thought a blond, blue eyed, septuagenarian retired teacher of 35 years was not really a threat--it was random. We went through customs in San Diego with a close connection and when returning to the terminal after customs, she was pulled aside again by a muslim TSA agent. I was surprised when this agent went so far as to open the change purse on my wife's wallet and rifle through the coins--wtf, are coins weapons that terrorists use now? Two checks on connecting flights AFTER going through customs seems a bit excessive.