[Vex]

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Let's say we have an extremely marginal hand in the BB; something like T9. We'll say that either the button open raises or the SB open raises, either way we'll assume calling his raise puts us heads up. We'll also assume that villain is aggressive enough to understand the concept of blind stealing.

Flop comes: AJ4, KQ7, or AQ8.
We check raise.

I think this is extremely useful. Essentially, in a defense situation we have added bluffing equity because we benefit from scary boards when villain misses (and he's betting that flop whether he hits or not. In otherwords, we can pay an extra BB on the flop to purchase the pot on scary boards whenever the stealer misses.

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Sounds like Fancy Play Syndrome to me. Here are some counterpoints:

1> You can't checkraise the SB if you're the BB.

2> SB tends to "steal" with better quality cards than the button, because of postflop position.

3> I think that using this technique, you'd be three-bet or shown down a legit hand often enough by the button that all this play would do is make you look a little maniacal.

4> To pull off a bluff, you have to be convincing. That means that you have to be legit often enough to put doubt in the minds of the bluffee. Plus, the bluff has to look like a move you would normally make. In normal blind steal/blind defense situations, what hand would the BB have that it would make sense calling preflop, then checkraising a two high-card flop with?

Overall, I think you're just drawing attention to yourself here without accomplishing much.