Well, we haven't been "moolah"-ed in a few weeks now. Rudy has now moved on to telling us "shh" or "stop" when we correct him or tell him no. It's quite funny at first, which makes it even harder to be serious and ignore it. He uses hand motions too - finger on his lips for "shh" or a hand held in front of him for "stop".
Here's a picture of him saying "shh" just to be funny. I think I was singing and he would say "shh" to get me to stop.