Yeah, in this case it should be Yelp's job to filter out fake reviews. Yelp should foot the bill for operations like this or for engineers to write better algorithms.
Are you saying that you'd ignore all financial incentive to protect your assets and rely on the government to protect you? We already know how well that works. It doesn't! I'm not against the AG investigating and prosecuting fraud, but I certainly don't want to set a precedent based on entrapment or put more ink on the books to grow bureaucracy.
You would have to insure your cars against theft. If you get robbed a lot, your insurance company would raise your premium.
it already works like your hypothetical scenario, so what's your point?
edit: an analogy from your point to what happened would be the government setting up a fake car rental and calling up thieves to agree to rent and steal their cars.
So you're saying we should rely on a private company for law enforcement? Presumably gun manufacturers should also be responsible for tracking down people who use their products illegally?
After all, I could write algorithms that used more and more information to determine criminality.