Darkaway,
Not that I can disagree with you, that very often trespassing is involved in urban exploration, and I'm old enough to know better to try to make excuses but....... If you take the time to actually learn what urban exploaration is all about you would find that there is a code of ethics even for this hobby. In short vandalism or any other behavior that would deface the property is viewed as unacceptable behavior. Many who UE are avid photographers and like to document various man made but forgotten works... Pretty harmless and mabe of some social good for future generations...? Just my two cents, and hope I did not come off as a jerk.
Dave