Ourstage says it needs to be funny to be in the comedy genre. Frankly a large percentage of the songs seem to be funny only to the entrants. I'm not aware that a song has ever been removed for not being funny. Yes, it would be a hard and arbitrary call but it appears that someone should be doing some screening. It could be that some entrants are putting songs up in that genre because it's one of the least competitive as far as numbers go and getting their PC posses to vote however they need, to promote themselves. I just put in my entry for the month:
www.ourstage.com/fanclub/summeoyo
"Big Busted Women Flat Busted Broke"
Do you think I'll get votes for the song or the picture - which by the way is cleared because I gave credit in the song description?

http://www.soundclick.com/Summeoyo
http://www.ourstage.com/profile/summeoyo1