The Attorney General's Commission on Pornography, delving into the seamy side of the obscenity business, is taking aim at such targets as . . . 7-Eleven?

A draft copy of a commission staff report says that "7-Eleven convenience stores are the leading retailers of soft-core porn magazines in America . . . . Profits made by 7-Eleven on porn run into the millions." Other outlets cited for peddling such magazines -- only Playboy and Penthouse are named -- include Rite-Aid, Dart Drug, Revco Drug and K mart's Waldenbooks.

"In addition," it says, "the U.S. military exchanges are major distributors of porn."

The document also cites CBS and Time Inc. for buying parts of cable television companies that air or produce such material as the Playboy Channel, and opines that "Ramada Inns has begun offering the American Extacy Channel to motel guests." The commission, chaired by Arlington County Prosecutor Henry E. Hudson, will give the companies time to respond before including them in its final report.

Legal Language . . . Advocates before the Supreme Court generally adopt a formal attitude, opening their arguments with, "May it please the court," and addressing the justices as "Your Honor" or "Mr. Justice." But William L. Summers, a lawyer for a Cleveland firefighters union battling an affirmative action plan, took a down-to-earth tack in concluding his arguments Tuesday: He called the justices "folks." Laughter could be heard in the ornate courtroom, and several of the folks themselves were seen to smile.

Off With His Cap . . . Defense Secretary Caspar W. Weinberger was playing shutterbug during President Reagan's recent trip to Grenada. As he was snapping photos of Reagan with Caribbean leaders, a news agency photographer noticed something wrong and offered the secretary some friendly advice: "Take off the lens cap!"