Isn breaking up an overcrowded party of 200-300 people and ushering them out onto the street creating a subsequent safety problem?
It’s not possible for the 200-300 people to remain in the house. Most officers don’t want to arrest students and take them to jail to ensure safety. So it boils down to using the available resources in the best way possible to get people out and on their way safely. Police will try to get people paired up to get home safely, and students need to take responsibility for assisting each other.