Correct, I (and others) needed to parse your words more carefully.

I am physically unable to assume and hold the position in the NoS. When I am directed to the NoS and I opt out, I say why. I am always directed (as I always will be) to the grope.

The first couple times I did ask about the WTMD. I remember the second time clearly because the TSO had a distinctive appearance and because of the answer: "We can't let folks choose their screening method or the terrorists would know how to plan." Oddly, I was 'offered' the WTMD + grope.

On re-reading your post, I honestly don't have a clue what you are trying to say. Seriously. You make a flat statement that folks who are unable to hold the position are screened by WTMD.

I am not allowed to choose (other than 'self-select' timing) the WTMD or the NoS. I go where I am directed. I opt-out because I know I can't hold the postion required for a clear scan, so I will require a follow-up grope anyway. You say folks in my situation 'are' screened by WTMD. Not 'can' or 'might be' or 'could be given the alternate option'.

The only way I am screened by WTMD is because I was directed to a WTMD or because the WTMD is the only option open at that checkpoint.

It would be great if folks with advanced Parkinson's, balance issues, etc, who can't hold still long enough for a clear scan could use the WTMD, but I can't see how it could happen. A terrorist could fake balance issues.