I was looking at http://dustcoin.com/ and noticed that mining some scrypt coins can be twice as profitable as mining litecoin.

Suppose that a litecoin pool operator actually gets his users to mine dogecoins or bbqcoins. He then uses the proceeds to purchase litecoins and pays them out to his miners. The end effect is that the pool operator is way better off than he would be otherwise.

Is it possible for this to be happening seamlessly without the miners not realising? When a scrypt pool miner is issued a work unit would it be possible to have them mine on a different coin than the user assumes?