BI Security Guards need a smackdown! (this is not an entreaty to violence)

I was working until 945 the other evening and discovered my jacket was locked into a storage room. When I went to the security desk to ask for help, I was given the rudest treatment. It was mostly tone of voice.
SG "What are you still doing here? We closed 20 minutes ago!"

Me "Um yeah, I was sitting up on C2 and no one told me to leave. Can you come..."

SG to other SG "Why didn't you clear C2? What the hell were you doing?"

Me "um, I just need my"

SG to me "hold on..." then to colleague "no seriously, why didn't you clear that floor?"

Me, getting angry, "Excuse me, your conversation is neither here nor there, I just need my jacket, and I can get out of here."

I start walking toward the storage room, and she followed. She said from behind me "You're supposed to be out of here by 9:30. You're supposed to know that!"

I chose to just keep my mouth shut. It just wasn't worth it.

I grabbed my jacket, said "thanks" and got out of there.

This is really not an isolated incident. The security staff is almost always rude to us students. There is no culture of service, no sense that they should they should even treat us with respect. I can understand that are probably not treated well by many of the students, but that does not excuse the behavior. A simple bit of training, and putting some better processes in place would have avoided the whole situation. A culture of respect needs to be implemented from the top down, and there should be a system in place for students and staff to let BI and the security company know when there are problems. I will investigate that further myself.