There are a LOT of people who believe that Penis Enlargement doesn't work, yet we have a strong community here that believes (correctly, IMHO) that it does.
There are a LOT of people who believe that pheromones don't work, yet there is a strong community at places like pherotalk.com that believes they do.
To assume that we're right and they're wrong without a lot of study, testing, etc., is a bit hypocritical. I don't know that they work, but I don't know that they don't. Some of the users at the site I just mentioned make very compelling arguments. Some might be marketing tainted, but the site feels a lot like the Penis Enlargement sites, like there is some validity to them.