Grimaldi, I really have no problems with people that get high once in a while. I don't do it myself, personally, but if people want to occasionally relax in that manner, all power to them. It's when they start toking every single day that you start to see problems. Not for everyone, mind you- I know people that smoke all day long and who live productive and happy lives. But for some, pot can have negative side effects. One of those side effects is paranoia. It's this kind of hypochondria and baseless fear of the 'non-natural' that sets the stage for websites like those.
Just because crackpots have websites doesn't make what they're saying any truer. I could post a link to a holocaust denial blog and it would, in a million years, never prove that the holocaust didn't happen.