You can't stop people from gathering on a public street. Toomer's is the most popular corner on campus - if ANYONE is at Toomer's throwing toilet paper, not only will other people walk over to see what's up, and start throwing it themselves, but when they find out what is happening, they will text/tweet/call everyone they know and get them to show up too. In this day of instant communication, I think the AUAD could have kept a total lock on this whole thing right up until the players left to head for Toomer's - then the texting starts, and the calls start and the cops get notified, and by the time the players get there, party in progress...
...and life goes on...