I agree with everyone else... just do it if you want to. I know I couldn't do it because I'd laugh too much... but there was a time when we had a second phone line living with a friend of mine and we had considered doing it on the side for extra cash. Nothing came of it because we just can't keep straight faces.
But if you like it, and want to do it... why the heck not?
Have fun and make some cash, Goodness knows that is what I'm attempting to do right now.... evil school bills. But what can ya do?