Today’s most popular headlines are Spirit Airlines Holds “MILF Sale,” Denies Having Seen “American Pie” (4,916 views today), Facebook’s Beacon Even Sneakier Than Originally Thought (3,831) and Target To Downgrade Return Policy: Receipts Always Required (2,832). Today’s most discussed stories are Spirit Airlines Holds “MILF Sale,” Denies Having Seen “American Pie” (51 comments), Facebook’s Beacon Even Sneakier Than Originally Thought (45) and Target To Downgrade Return Policy: Receipts Always Required (41).