That might be classified as "lying" to a federal official, which some on here would be oh-so-quick to point out to be "wrong, wrong, wrong - nanny, nanny, boo, boo".

The far better approach?
1) Wear sunglasses
2) Put earbuds in your ears and pretend you're listening to an iPod
3) Ignore anyone who speaks to you
4) If tapped on the shoulder or something similar, ignore them
5) If tapped again, make a scene - demand the police to come and press battery charges (you were touched without your permission and against your will - I imagine there would have to be something to cover that)

Get the person's name as well. When you return home, go to small claims court and file a lawsuit against him/her. It's cheap to do this, and will cause the TSA employee to take a day off work to show up (or risk default judgment).

We can create problems for TSA by performing actions that increase turnover and make it harder for them to recruit quality people. If turnover is at 20% now, we should try to push it to 25% by the end of the year or middle of next year. Then push it higher than that. It will be nearly impossible to maintain quality in an organization whose workforce completely changes every 3-4 years, not to mention all the costs associated with that turnover. We should do our best to make turnover the #1 issue on Pistole's problem list.