Hey Mordred,

Quote
... what makes them a 'mole' rather than someone posting their own opinions ...
It's all part of the conspiracy theory. You know, caused by cognitive dissonance, when it is easier to believe that there is a world-wide conspiracy of scientists from all kinds of different branches and the media, all involved in a conspiracy to hid the truth, rather than admit that ones (ill-informed) opinion is wrong.

Enjoy.