College Park, MD Patch, 6/4/12:
QUOTE
UMd., MTA Work Toward Campus Safety

Metro's Purple Line may keep its doors closed after 10 p.m. at the three light rail stops proposed for University of Maryland’s campus, according to Vice President for Facilities Management Carlo Colella.

Get this story here.
Not sure if this is the best policy given how college students may wish to be out and about late at night. And having transit available would possibly discourage drunk driving.