The problem is not the internet. The problem is that people are too stupid to separate opinion from facts.
Well, in the past and with big news organizations being the "gate-keepers" they did "keep a lid" on things that were so ridiculous and patently obvious as hoaxes and such ridiculous ideas, that they "never saw the light of day".
Now, with the Internet, the most idiotic idea gets "front-row billing" on someone's website. So, that does require a bit more common sense with people.
AND..., from what I've seen here (with some comments on the board, overall...) stupid ideas and idiotic theories do abound even here.
I'm sure that's what they mean.
However, I'm personally more than happy to tell others that they've got a perfectly ridiculous idea that they're spouting off about -- just so I can keep reading things without the previous "gate-keepers" ... but the stupid ideas and absolutely ridiculous theories do certainly abound on the Internet.
Not as much as you think. CSICOP got started because paranormal phenomena became a "phenom" on the MSM. Uri Geller, Erich von Daniken, et al., got through fine back then.