Investigates? Not always. He regenerates a LOT of stuff and churns out several books per year. I get his Visible Ink books to review and I can find the accounts taken from anonymous online forums. It is what it is (which is often modern versions of folklore - alien visitors, men in black, black-eyed kids, urban monsters, etc.). (As someone has done before, I suspect my comments will be copied and delivered to Nick. Weird to do, but whatev... We've had dust-ups but he's no fraud and not a jerk. He pretty much knows what I do and that we won't usually see eye to eye - no ill will, though.) Blackburn is a cut above in writing his books. He takes more of a journalistic route and, while he gets a little sensational some times, I enjoy his books and find them to be usually the best on obscure and scarcely covered subjects he tackles.
I'm not dismissing them; I don't know where you pulled that from. Be a bit more charitable in reading between the lines, please. I enjoy the work of both authors. These subjects have a broad range of contributors from ungrammatical self-publishers to scientese-speaking academicians.
Why show any interest in Forteana? What an extremely odd question! I've researched these topics for 30 years and will continue to do so. One reason I love it is because there are mysteries out there to think about. I don't want to believe, I want to know (which is a lost cause) what people saw and experienced because it's pretty amazing. As other people have noted, if there were no critical thinkers in this forum and in the general discussion, the topics would be too ridiculous to pay any attention to.