A couple of replies: Wolverine, I was a veteran of the street scene for years. The reason prostitution arrests are down is because there's nobody out there anymore. I've driven down some of my old haunts and there just aren't the SWs there were five, six years ago. The quality used to be quite good and the prices excellent, but there are almost no worthwhile SWs on the strolls anymore. The quality is at MPs.
Second of all, dear Wolverine, do not be paranoid about posting. Visiting MPs is legal. Having paid sex with an escort at your home or hotel room is legal. Only legal technicalities of this hobby are unlawful--i.e. communicating with a prostitute in a public place, living off the profits of prostitution, etc. This is not (yet) Communist Cuba or Nazi Germany. You will not get busted for visiting an MP and writing about it.
Thirdly, the police are already engaging in the practise of "warehousing." This means prioritizing criminal cases and investigations and putting the lower-ranked ones in "File 13." There simply are not enough resources to deal with gang violence, stabbings, murders, assaults, robberies and car theft as it is. They would be risking the wrath of their bosses--the taxpayers--if they diverted resources from serious criminal investigations (like Edmonton's exploding gang problem) to harassing men who visit MPs for consensual encounters with adult women.
Jim, with all due respect I view your point about "just don't do it" as irresponsible. It's none of anyone's business if I choose to have sex with a prostitute. There are all sorts of behaviours that some people consider morally wrong and feel should be illegal. I remember speaking with one federal MP who believed simple ADULTERY should be a criminal offence. There are people who object to those of us who eat fatty food, who drink alcohol, who gamble. And there are still people who want, say, alcohol banned, even though we all know how well that worked. In a society that is technically a democracy that respects human rights, the law needs to be pretty limited. Unless I'm doing something that openly violates the rights of others (e.g. theft, arson, murder, assault) what I do and who I have sex with is nobody's business.