The link is old, but real, lamer. I pay fines to PWC for putting up the signs. I'll pay fines all day for civil violations. Steal the signs, and it a criminal offense. You're right, prosecution is a long process, but it happens. You want to risk a crimnal record for a $1.20 sign, and an ass-kicking, go right ahead. I feed my family with that money, so if you want to step in front of that train, hey, it's a free country.
Be sure to schedule a fake appointment from a known number so I can find your address, name, etc. And just FYI, we call cx's ahead of time so if you don't answer, we don't show up.
http://www.causs.org/dc/dcboard.php?az=show_topic&forum=55&topic_id=13&mesg_id=13&page=