Scattered throughout the grounds you can still find clusters of perfectly preserved tickets lying safely under fall ceiling tiles and overturned tables. People Have mixed feelings about souvenirs in regards to urban exploration. The purists might say that you enter a space, explore it, leave nothing and take only memories. Some will take photographs, a few will take objects ( a sign, a chair, an old jar), and some will pillage, smash, and destroy. At the end of the day it is a land without law. You make your own code as you go, be it selfish or selfless.
Personally my goal is to preserve it for the next person as it was preserved for me. That said I do try to take a small insignificant, object from each location. Something that is plentiful, say a corner piece of floor tile, a broken poker chip, a flyer or ticket, something that fits in the palm of my hand and won't alter the experience of the place when it disappears. It is to be added to a small catalog of unrelated objects on a shelf. It acts as a sort of alter of appreciation for the experiences, and memories from these places.
In this case I folded three rocky point tickets and put them in my pocket. I won't go into detail about the nightmare that I had that night, but it was righteous and haunting. I woke up covered in sweat, and with an incredible urge to burn the tickets (I even woke my brother up to tell him).
The urge to simply get them out of my possession was incredible, yet against my better judgement they've stayed at my house. The experience was interesting and powerful a hint that maybe I need to revaluate my code next time I return ( i.e that dude and his brother go back). We'll see what happens in two weeks.