Sorry for not getting back to this post; I've been travelling and forgot about it.
In order to explain where I'm going with this, I need to make a few additional statements:
1. Poker is a game of decisions. When your opponents make bad decisions, you make money.
2. Therefore, you should try to make your opponents make bad decisions.
3. Making a call with a drawing hand when the pot odds
are sufficiently good is not a mistake; it's correct. Therefore, an opponent who calls with the correct odds is seemingly costing you money (as he is not making a mistake).
The keyword in statement #3 is "seemingly," and that's what my addendum was about
Your opponent, despite getting correct odds to call, is making a mistake when he calls: He's making the mistake of thinking that you won't raise him.
If he knew that you were going to raise when it gets back to you, he shouldn't have called (he might have anyway, but he won't have the odds for it).
This is a fairly advanced concept, that for some reason is usually better understood by beginners than by intermediate players; I think a lot of books actually confuse players when they talk about "protecting your hand" and "forcing your opponents out." And I even added to the confusion in the original blog post where I talked about it, which makes me one of the culprits as well.