Again, the police did act, according to the posts above. The girl was being harassed in the store and the police made her leave along with the rest of them, into an area without any police. She pleaded with them not to do this, but they did it anyway.
playing devils advocate...security guards are employees of private companies and have no official law enforcing capacity...even if they acted as a concerned citizen as long as they wear the uniform of the company they represent they would be liable for any actions through lawsuits regardless of intent. In other words if the security guards had acted and the situation escalated chances are they’d be sued into oblivion. Their “observe and report” policy is most likey the result of past circumstances where security officers got involved in a situation outside of their duties when they shouldn’t have. In a world of pc and frivolous lawsuits they had to play it safe.