...let's just be clear on the fact that nobody's suggesting to bring back the p3n1s.
Joke games are, in scope and execution, intentionally silly - or stupid, depending on your point of view. Examples of joke games would be RLBAT, Me Go Home, Lazarus Want's Pants, etc, where the game author is in on the joke.
The p3n1s award was purely about (good natured?) ridicule, usually at the expense of the person who received it. And, if I recall correctly, it wasn't limited to games.
Of the 79 games that fall under "Joke Game" in the database, 76 are one cup games...which would lead me to believe that joke games are, by and large, rubbish. And having a category for celebrating one piece of rubbish over another seems a bit redundant.