I believe TAPS is the standard by which other paranormal groups are judged.
They don't assume every single bump is a spirit and they've set the record straight on rain drops and dust bunnies (orbs).
I think alot of people view the success of Ghost Hunters and find that it is an anathema to paranormal investigation. And I agree, when you're on a long running series anything you present as evidence is going to be suspect.
But what I don't get is how people who have never been on a paranormal investigation can say that this show is faked. Are the basing it solely on the fact that they don't believe it? Or do they have some other scientifically sound explanation?
I think in the end that jealousy is a huge factor. I'm sure there are lots of plummers out there who would love to be on their own show but they just never got the contract.