Security Guards

Well...once upon a time I was invited over to Lena's apartment for her roommate Michelle's b-day party which was to consist of decorating cupcakes and hanging out with some pretty awesome people. So after all the cup-cake baking and packing about 15-20 people into Lena's living room it began to get a bit warm so we left their door open. Somewhere around the 11ish hour a female security guard shows up at the door to tell us we either need to close the door or make less noise because she could hear us from really far away. Telling us that we have neighbors who we need to RESPECT. We were all rather amused by this and just kinda of laughed as she walked away, she was not very happy about this. She comes back to the door and says "you do have neighbors and you do need to respect them. So we showed our neighbors respect by inviting all of them to come enjoy cupcakes with us, which most of them did. Now I know this is a funny story but also it irritated me a little bit because the security guard came to the front door of Lena's apartment to tell us to be quiet at 11 pm on a thursday night but one night I was trying to sleep at Ashley's apartment and there was an EXTREMELY loud party going on where one could only imagine what was going on and there was nothing done about it? hmmmmmmmmmmmm interesting....any thoughts?