They train you to be a psychopath.
This is entirely true. Many of these pickup artists (PUAs) are just rapists who rape for a living and then teach other men to rape too. Seriously, steer well clear of those guys. Here are a couple of quotes from the notorious Roosh V's books:
While walking to my place, I realized how drunk she was. In America, having sex with her would have been rape, since she couldn’t legally give her consent. It didn’t help matters that I was relatively sober, but I can’t say I cared or even hesitated.
I won’t rationalize my actions, but having sex is what I do.
After dinner we went upstairs and I eased her onto my king-size bed. It took four hours of foreplay and at least thirty repetitions of “No, Roosh, no” until she allowed my penis to enter her vagina. No means no—until it means yes.
The sex was painful for her. I was only the second guy she’d ever had sex with. … She whimpered like a wounded puppy dog the entire time, but I really wanted to have an orgasm, so I was “almost there” for about ten minutes. After sex she sobbed for a good while, talking about how she had sinned in the eyes of God, but in an hour she got horny again and we went at it once more.
Seriously, avoid those guys at all costs. I don't know how Roosh has avoided jail, or how many of his disciples haven't.
Because they are professional liars, they tell fake personal stories or do massive embellishments over them.
There's lots of these people and these kind of communities born everywhere, having pyramidal schemes to sell other members all kind of courses, seminars, books and videos. A known one is "Mystery", another one is "Style".
They just get very tiny amounts of true (don't be shy to talk, have self confidence, have some clothing style good for you...), tons of pseudoscience terms, lots of lies and lots of shitty and boring tales about their experiences as some kind of pornographic text.
Anyway, these kind of assumptions would need some kind of criminal investigation. They might be fake or not, but they promote sexual harassment.
Geeks and Nerds are some of the main targets of these scammers. Let's face it: Our passions aren't still so attractive to most women.
http://www.dailydot.com/lifestyle/neil-strauss-interview/