We ought to set up a public FB page that has provable trickery like we have shown here. There is nothing illegal with "interfering with business" if the business can be shown to be operating in bad faith. In the US, if the business were to sue, it would be up to them to show the statements made about them were false. Since they would be true, the business wouldn't have a leg to stand on.
I think of how much money the Tiffany Fakes site may have saved people over the years. And they even have the guts to name names. I haven't checked them in a while, so guess they are still up and running.