They are called "renegades" by the University of Pennsylvania administration, but underground fraternities just became a little more visible with the leaking of recent emails.

A student-run blog at Upenn called Under the Button obtained emails detailing a $2,000 purchase of vodka, a worrisome message that another frat is better at meeting women and a strange Valentine's Day request.

OZ, Theos, Apes and Owls are among the "nuisance houses," as UPenn refers to them, that bear a warning to incoming students to "beware the renegades."

"A number of organizations exist at Penn that claim to be fraternities or sororities. The may think of themselves in that way, but they are not legitimate general social fraternities or sororities recognized or sanctioned by the University of Pennsylvania," the warning reads. "Many of them rose out of the remnants of chapters that were closed down for serious disciplinary action, and the dangerous culture that existed then continues to be perpetuated. These organizations do not have inter/national offices or programs, do not have liability insurance or regulations against hazing, the role of alcohol with in their organizations, and may or may not have any oversight or influence by more knowledgeable alumni. They are seen as nuisance houses and have over the years caused many problems both for members, other students, and neighbors."

One frat member sent an email with a photo of a liquor store receipt. The email indicated the buyer had spent $1,636.44 on "vodka" and $431.88 on "Skyy Vodka." And in another email, the sender included a fairly large bag of marijuana.

In a separate set of emails, a member presumably from Theos, the sender expressed concern that women liked guys in Apes better. The sender suggests making up fake stories to insult and defame members of other underground frats. His ideas include making up a rumor that one group had an outbreak of hepatitis C.

In a separate email, also from a Theos member, the sender suggests using women's favorable view of Apes to their advantage by forming an association.

In perhaps the strangest email, the sender instructed pledges to call his girlfriend on Valentine's Day to sing to her and also to deliver her flowers. He also told them to call, but not sing to, his mother and father to wish them a happy Valentine's Day.

The subject matter of these emails are similar to what has gotten fraternities in trouble recently, such Dartmouth, Vanderbilt, Georgia Tech and others. However, the emails did not contain very damning speech and, since the school does not recognize them, the groups will most likely not be faced with disciplinary action.

The language can all be chalked up to free speech, but the only way someone could get in trouble is if campus police ever found the marijuana from the photo on one of the members.