>>> take it off or go to secondary screening ...

(hypothetical although I plan to try it some day)

Here comes this guy wearing a baggy hooded sweatshirt with nothing underneath.

Screener: "you will have to take off your sweatshirt"

Unfortunately the only correct response at this point for the guy is "May I go behind a curtain to do it?"

To which the screener will likely respond with something like "OK, this way" as he leads the guy to the secondary screening area.

But if the screener says "take it off here" the guy has to obey. After all he chose to go to the airport dressed that way, unlike the guy who went to the airport with a razor blade in his shoe he knew nothing about and caught holy hell (I'm too lazy to find and insert the link to that post here)

Travel tips:
http://members.aol.com/ajaynejr/disney.htm

>>> Man made a comment that in a few years we'll be stripping naked. Screener who told him to take it off said that will "never happen."

It might happen accidentally if the person failed to ask "May I go behind..."