This is my favorite part of your arguement. Since everyone else is overreacting you have to as well.

Rather than trying to explain to the 150 other passengers that you expect to become upset that there is actually no security risk and that the person has passed the TSA checkpoint just like they did and that there is no risk of problems, you would choose to revert to the lowest common denominator, which is to assume the worst of your passengers and of the "instigator."

Thank you for protecting all of our safety

And I'll suggest again that this thread make a bee-line to the TSS forum. For one thing it'll be way more entertaining to read the responses that roll in with the added visibility, and for another it really is a TSS issue, not a JetBlue issue.