Since leaving for good I have always liked to "anti-witness" whenever I get the chance.
I found that people used to question it if I called the JW's a cult, they used to say things like "Oh they are not that scary !", and of course the WT does a good job of masking its cult status, and its high control tactics.
Most people too, are just not interested in doctrine.
So, lately I have simply started saying "It is a Scam!" , if they want details it is easy to say in a few words how the property business part of the scam works.
But I think if we can get the idea out there that it is a scam, pure and simple, then more people will avoid it than would merely on my or your claim that it is a false religious cult.
So, "Scam's the word" if that goes viral it should stop a lot of people from falling for it.
Of course, they will still suck some in, but they will be the same people still falling for the financial scams coming from Nigeria.