With comments in that forum, such as not to worry, the place is now not being so hard to get into, wink wink, I doubt that all of them just trespass.
I have commented after having looked through that website and noted everything, including the quickly removed comments from people, such as authorised visitors, accusing people of breaking in. As I said before, if a place is abandoned, and fallen down, and completely open, no problems. But I am not impressed with pictures of people climbing up walls, and going through windows with the ground below showing fresh glass shards.
i was always brought up to respect other people's property, and only go in if the owner had given permission, even if the owner was a government entity, or a private corporation, but maybe I was brought up on another planet.
I do know that if someone trespassed on my property, a), I would like to be told if anyone found out about it, and b) if I found them on my property, they could wave their silly 'taking pictures is not a crime' badges on the way to kissing the ground after being ejected summarily from said property.