The phrase "conspiracy theory" is a misnomer,
and some people seem to fear the word itself.
A more accurate name for that forum
would be "Cover-Ups and Controversies".
E.g., there is no doubt that people "conspired"
to pull off the attacks of September 11, 2001.
The controversy lies in the "who and why", not the "what".
Many people believe everything they hear
on the news, or that they read on Wikipedia,
or that some parasitic elected official says.
Others of us don't buy the mainstream narrative of history.
I don't believe most of the garbage that's posted
on that forum, but is it logical to label it all "insanity"
and call for it to be put on the chopping block? No.
What's insane to me is that the OP frequents
a forum which he so thoroughly despises
and calls for its deletion based on the pretention
that it's a stumbling block to potential converts.
The OP's gushing over his love of death-metal
and the lowlife Eminem are far more likely to
confuse a new or potential convert than someone
posting about how he thinks the Earth is flat.
Get some perspective, "Dude".