I have never had a problem with security guards. Most are very helpful.
Anyway, one time I could not get the number to open the gate. I was on a 911. I suddenly heard gunshots and crashed the gate. One person down in the parking lot and two more injured.
It happens and the government did not have to pay for the damages.
Like you said, there are extinuating circumstances in just about everything.
One other incident was at a state run institution for the mentally ill. A patient called the police for help. Arriving, the security guards did not want me to enter the building. I advised him he was interferring with police business and to step aside. He then said I could not take my weapon inside the building. I again advised him I would arrest him if he did not step aside. His supervisor appeared and I was escorted to the caller and took care of his problem.
People do not realize that interfering with the police is a crime.
A woman called for the police for a domestic violence at her home. Knocking on the door, the husband would not let me in. I heard his wife crying in the background. I pushed the man to the side and attended his wife. Wife took her children, an suv and left and never came back.