It actually is not that complicated, at least on the "everyone thinks they are intellectuals". The moment you think you are so right you should be suppressing other peoples right to speak on the matter, you are immediately not the intellectual, you are just a tyrant.
I'd second the appeals to authority argument, if only on the grounds that science (the institution) is exactly that: an institution. It is also a game:
http://www.melconway.com/Urban_Teaching/pdf/what_is_science....
Everyone thinks they're the intellectuals. Even the people prescribing thalidomide to pregnant women. A strong sense of skepticism should be encouraged, not mocked, and appeals to authority should be seen as invalid on their face.