If you wonder why are they there and if they also spread bad information then maybe you should speak up about it and invite others to do so as well.
Perhaps I will. I'm still wondering why the **** they got greens in the first place for them.


If you do not want harsh criticism of your work, you are best off double checking your facts and possibly providing links to supporting material or actually pointing out where (what book, seminar, etc) you got your information from.
No one can disagree with that. Comment, question, suggest, and then let the person responsible for the tutorial make the necessary corrections. That should do the trick, unless the information provided was intentionally misleading. I doubt that is the case here.

`pw