Mine will be right inside my pants waist. Very little chance of it being found, even with a pat-down.

My understanding of the TSA's ability to implement such a policy is based on not a ton of knowledge, but on the previously revealed comment that the TSA has the ability to require ID based on existing legislation should they so choose. I'm not so sure that they have the legal right to distinguish between folks who choose to not show ID and folks who lost their ID. That seems very arbitrary and outside the scope of the legislation used to establish the organization. It will be interesting to see how that plays out.