No Trespassing--Vancouver's "urban explorers"...

"To urban explorers like Ninjalicious (and now me) 'no trespassing' signs serve as an invitation to investigate the drains, abandoned buildings, steam tunnels and other facets of the city most people never glimpse. We operate under the belief that trespass, while technically illegal, is not immoral. We don't vandalize or take objects from sites, and most of us follow a strong ethical code that mirrors the Sierra Club's: 'take nothing but pictures, leave nothing but footprints'."