Should college campus be open to all?

SUN YAT-SEN UNIVERSITY in Guangzhou, South China's Guangdong province, has reportedly started denying residents access to the campus and requiring its students to present valid student cards before they can enter. Beijing Youth Daily commented on Tuesday:

As more universities choose to open their campus to the public, Sun Yat-Sen University seems to have decided to go the opposite way. It is reported that an alumni who wanted to use the university's library was also denied entry to the campus, because he or she was no longer in possession of a valid student card.

However, the university's claim that the move is to prevent "unexpected incidents" following the open-campus policy is plausible. It said the decision to shut its door has a lot to do with the security risks revealed by some recent incidents. Earlier this month a possible psychopath barged into a classroom with red banners around his body; a few days later an unknown man intervened in another seminar and attempted to make an improper speech.