Washington, DC -- The music industry has ratcheted up its pressure on universities and their students to stop downloading music illegally on campus networks, the Associated Press reported. The Recording Industry Association of America (RIAA) identified for the AP the 25 schools that have received the most copyright complaints so far this year. The University of Ohio, Purdue, University of Nebraska-Lincoln, University of Tennessee and University of South Carolina made up the top five. Purdue students received 37 complaints in 2006, but so far this year have been sent 1,068. "It's something we feel we have to do," RIAA president Cary Sherman told the AP. "We have to let people know that if they engage in this activity, they are not anonymous." The complaints are sometimes a preliminary step towards filing more formal copyright infringement lawsuits, which the RIAA has done against the most egregious campus offenders.