Neil Katz of CBS News notes that “Facebook’s position on the ads is ironic considering the content found on its site. One group called “Marihuana, Marijuana, Mariguana” has 369,000 active monthly users who post photos of bikini clad bong smokers and giant piles of weed. A popular game on Facebook called “Pot Farm” has 740,000 monthly users who enjoy trying grow their own virtual marijuana fields.”

[More coverage after the jump. You can see the ad Facebook banned, sign the Facebook petition and swap our your Facebook picture for the censored "Just Say Now" image here.]