Selling snake oil: knowingly selling fraudulent goods for one's own personal gain.
Sorry, I don't see it. Could be my rose colored glasses though. I like wearing them. Those and a good pair of shoes make for a pretty good day. Yes, I'm naive.
I have no problem stating strong opinions when they are solicited. A poster starting a thread is an invitation to discussion. That's why we are here. Sometimes I will say something someone doesn't like. The reasons why they might not like my opinion are myriad.
When they generalize that since it worked with them, it can work as well with others, if others would only give it the proper effort.
Ahhh yes...this is real. "It works if you work it." Of course people are passionate about what has worked for them. I do see most people saying things like "see if this works for you", or "this may make sense to you" or something of that nature.