>>19830088 Yes They have a "Duty To Protect" They have a responsibility to inform students of any known danger. If they fail to inform it could be seen as negligence and civil liability might attach. Here is a quick read that explains. The mobs acting now show a foreseeable danger and they are required to take action. Ultimately the students will have to decide if they stay at the school or not.

https://www.ravemobilesafety.com/blog/what-to-know-higher-education-institutions-duty-of-care/#:~:text=Essentially%2C%20a%20college%20is%20responsible,e.g.%2C%20visitors)%20on%20campus.