Quite simple: Many, too many people in these forums think of themselves as a unique snowflake and are completely convinced that they have something to contribute or to prove that the rest of the world seems to conspire on to keep it secret. Thus, non-existent issues will be taken up and defended, and promoted, even if contradicted repeatedly - (objective) truth is of no concern to those people.
Its something like an OCD, really.
see also
http://en.wikipedia.org/wiki/Dunning...3Kruger_effect