Barged In

Just about 15 mins back, about a dozen cars carrying more than 50 college studs from Vasavi, barged into the campus, honking their way towards the main building. They were campaigning for their festival, Euphoria. A single security guard is still visible trying to drive them out. Not only did they 50-or-so have a jolly nice ride racing around in the campus, they threw pamphlets, pasted them on the walls, and tried to enter the main building. A total security breakthrough.
Some quick questions:

• How did they get into the campus in the first place? Where's the main-gate security?
• Do the new security rules apply only to us?
• Do we have white walls just so that a random crowd can post on them?