You know Gabriel, I'm not even sure Mona and "The Look" would have an affect on Waldo.
Rosie has tried unsuccessfully to keep him in line and he just ignores her.
He lives in his own little Waldo world doing Waldo things oblivious to what is going on around him. When Rosie tries to exert her alpha dogness on him, he thinks she's playing.
I'm telling you, I think we could all learn from Waldo. Be happy, don't let the little things bother you (like Rosie), always wag your tail, try to lick as many people as possible, and assume that everyone loves you. Make sure you chase a few squirrels everday to stay in shape and spend a part of everyday gaving out the window contemplating life and always take naps!