Noises in un-maintained structures are to be expected. With very few exceptions the sounds are easily explained away. The disused places I've been in whistle, creak, moan, crackle, pop, rattle and thunk. The number of times the air currents have slammed doors somewhere on me is too many to count on ones' hand. Bear in mind that if these were running buildings there would be hums, buzzes and other noises that would cover up the low level building "chatter".
Andrew, it doesn't matter if the facility is abandoned; you have no right to trash it more than it has already been. Urban explorers may invade these places, but they should cause no harm while there. Damaging the buildings merely increases the likelihood that they will be torn down instead of restored. Breaking windows lets in even more water, which it should be obvious is not beneficial to the structure.
Andrew people like you and your friends are despicable. I have no use for low life scum like you and your friends. Its people like you that me and my other Fire Fighter/EMT friends have to go and rescue because you thought it was cute to destroy a place like this and got hurt in the process. I can tell you one thing sonny if you ever come to my district and needed help you would get it, but not as good as care as if it were someone else that was just there looking around or taking pictures.
I do believe a fare punishment for you and your friends would be to get servilely sliced by the glass you decided to break, and be caught by the police.
Like I said in one of my other posts. How would you like it if someone came to your house and decided to bust out all your windows just to release them self's?
The top rows would hold the "lightweights". Any average guy with a step-ladder could load frail bodies or children up there. All the big-uns would go low.
Let us not forget that these same idiots that go in and trash things will have to explain to the local ER where they were when in their own limited intelligence got hurt because they thought they were being "cool".
Which will only result in these locations being more heavily patrolled by more than just security, and in some cases will bring the date with what ever development company has plans for them because the company won't want to pay out anymore hazard insurance than they already have to.
Which will of course take the real explorers and push them out, or worse, get them caught.
I saw some abuse. I worked there 1968-1971. I worked in the med surg bldg. People where brought in obviously beaten up. The attendant would say the injuries were from a fall. If some one was admitted and put on the critical list for twenty four hours it was not an ME case. my head nurse got wise to this and started refusing the admissions. I saw alot of neglect mostly. There were many escapes, both failures and successes. We had a man once that jumped three stories, broke his back.
I worked in thet bldg. from 1968-1971. Some where on those grounds is a cemetery with unmarked graves where unclaimed bodies were buried. Kind of a Potters Field. Sad place.