By all means, do it!
If it matters, I was compelled to start it when my GM accepted the challenge to make the most useless 'villain'. One exchange went like this:
V: HAHA! We meet again, vagrants!
Paladin: Is he talking to us?
Cleric: Oh, I remember him! He was that guy who made peasants in the last village demand healing… which we would do anyway.
Me (Rogue): Why are you calling us vagrants?
V: No permanent keep, no stable income. What else should you be?
Paladin (pulling the villain's leg but saying in the most knightly ye olde way possible): Ney! What manner of wizardry had doust use to uncover our keenest of secrets, fiend!?
V (GM managed a triumphant tone despite wanting to laugh): It's not the time and place to discuss it, for I have arranged the peasantry… a school.
Cleric: You monster! They are but children!
V: It's only one of the many sly plans I have prepared for you. Soon, the referendum to decide your fate will be called and thy deeds shall be judged by vox populi!
Paladin (I don't know if it was in or out of character): What's vox populi?
V: The children know it already. From school.
Here we had to have a little break because it was too much of silliness. :D