An abandoned building is not necessarily a dangerous situation
Perhaps, but just as easily, an abandoned building can also be a very unpredictable and dangerous situation due to structural or wiring issues, for example. It's a crapshoot. Sure, call it hypothetical, overblown hyperbole, slippery-slope fallacy bullspit. Fair enough, and yes it is true emergency personnel have signed up for a fairly risky job in the first place, but I just think it's incredibly selfish and disrespectful to make a decision that could put someone else at risk, even if it is remote, in order for you to get a shot. Is it really worth it? Me thinks not. Not the way I roll, but YMMV.
It can, but more often it's a liability thing. The property owner does not have control over the property. If a bunch of kids smoke some weed and decide it'd be fun to burn the place down, taking with it neighboring property, the landowner can be held responsible. Ultimately the property owner is responsible for the site, including what happens inside it - including people falling through floors, setting fires, raping school girls - whatever - legally it's the landowner's responsibility. Just as if you allowed people into your house and didn't keep an eye on them, it being abandoned doesn't really matter.
A "No Trespassing Sign" is basically saying "No, you're not allowed to be here and no matter what you're doing here I don't condone or permit". I don't really know how effective a No Trespassing sign is on a legal standpoint, Gipson seems to think you can just ignore them and sue anyway - I have my doubts it's as easy as that - but I also wouldn't be surprised if they're not rock solid either, and probably only offer one line of defense in an Attractive Nuisance case.
There are some odd things, I've been told by an attorney that "Beware of Dogs" signs essentially say "Yeah, I know my dog is dangerous" so if it ever escapes and bites someone, the first thing the attorney will say is "See, you knew your dog is dangerous". I'd imagine the same could go for "Danger" signs - and an attorney would argue that the structure should have been demolished.
I'm a bit torn, you know. On one side I really do think landowners shouldn't be permitted to sit on delapitated buildings which attract youth, the homeless and crime - I can't hardly blame a homeless person from using an abandoned building when shelters are frequently full - but at the same time I can't logically reason liability to the landowner when people knowingly violate trespassing signs.
And what about when trespassing is common? I do frequently trespass on the irrigation ditch right of way, everyone does. The no trespassing signs are rusted and barely legible, and haven't been repaired for decades, property owners have even maintained their yards, illegally, right up to the canal. The only reason I know it's still trespassing is because I've known people (unsavory looking types) who have reported that the police have given trespassing warnings. But I've never known ANYONE to actually get in trouble, and it seems the police only enforce it if they are either bored or think you're drunk. Shouldn't property owners have to make maintain their signage, and the police equally enforce trespassing? Why is it that if you own a house that sits next to the canal you can set up a lawn chair and a garden, but if you're homeless you can't even walk along it?