You protect a big pocket pair by betting. Also, most people with any pair besides a pocket pair are probably correct to be calling you with the number of outs they have. Flipping your cards over hurts you far more than it hurts them. (No, I don't know the answer to your question. But your reasoning behind asking this question is troubling. Low limit holdem is hugely profitable because terrible players put far too much money in against hands that dominate them. Continue to dominate them, rake in monster pots and be prepared to say nice hand when someone hits a 2 outer on the river, because it's why you're making money in the first place.)