I've been selectee'd before, and the search I got for "opting out" (that's what they said, "opt out! we've got an opt out!") was identical. They didn't mark my boarding pass or anything, though. In case you're worried that you'll get re-harassed at the gate... no.
An opt out, I love these guys' verbiage. As a master of personal organization, I've flown without id a few times and yes, I was mostly wondering about the chance of getting an extra search at the gate. Which, really, isn't that big of a deal either and certainly not compared to someone taking digital naked pictures of you.
