[Sir Folds A Lot]

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You can only do it when you've missed the big blind. So instead of waiting a hand, you can "buy the big blind" by paying both the big (that you missed) and the small. You are the only blind in that hand. The next hand you get the button.

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Even if the blinds are a few past you thus "resetting" the blinds and making others pay blinds after you when they may have just done so a hand or two before? (I mean in hands following that hand)
It seems like a good way to foster collusion by having someone get up and leave the table, come back and buy the button so his partner could retain the advantage position (assuming he is later to act) and allowing some to see a few extra "free" hole cards.
Imagine you are two guys to the left of someone who buys the button. What if you were the big blind the hand previous to the guy buying the button? Then you'd be the big blind again right?