Goddamn, Johnny, it's good to see you again! I just read an article of yours yesterday. It was brilliant, and something I'd never thought of before.
I do it. I seldom do it, but I do it, on purpose. In an SNG, where I have zero chance of winning from the BB, I sometimes fold instead of checking. I have several reasons for it, most of which go missing in action, I believe. First, it's actually very unusual for anyone to do this. It looks like a moronic thing to do. You have a free ride, so you're folding? Even the computer wonders if I know what I'm doing, as it says "are you sure????" HAHAHA, yep, I'm sure.
I try to create an image of being a very tight player, early in an SNG. I want everyone at the table to think I only bet when I have the nuts. Folding when I don't have to fold reinforces the image. Granted, only a couple of people may notice, but those most likely to notice are the ones who'll still be around when my strategy pays off.
If I'm able to still be in the game when it's down to four or five and the blinds are sufficiently high, then I'll shift gears from grandma to overdrive. My tight image should now allow me to pull in chips which I don't have the hand to win. (I don't like the term stealing, because it implies taking something I don't deserve to have.) I've worked for the time when chips will come my way without having the hands I showed earlier.
Folding instead of checking doesn't guarantee it, but it's part of an overall strategy. And if by getting out of the way, the two who are fighting over a pot I invested so little in go overly aggressive, all the better.
If it's not illegal, I say I can do it, for a reason. If it's immoral, all the better.

First, know the rules. Then, flaunt them.
or am I wrong?
CJ
"Are the players better as the stakes go up? It's not an exam; it's a buyin." Barry Tanenbaum