When I was a kid, I thought the standard signs said, "Trespassers will be persecuted". It really scared me--I imagined all kinds of torture. Somebody finally told me it was PROsecuted, and then I wasn't scared anymore.
I'd rather be persecuted than prostituted, though I'm sure it could be argued that the latter could be construed as a method of the former. Either way, wouldn't really want to trespass there...
http://www.flickr.com/photos/typefour/2250891768/