How much you enjoy or hate Ghost Adventures all comes down to a single question: do you believe in ghosts?
If you do, then chances are you’ll be more likely to take the words of its investigators at face value, or at the very least buy into what they’re selling. If you don’t, you’ll be more eager and more capable of poking holes in their “investigation” than I could ever be.
Personally, I can’t say that I believe in ghosts. I’m not saying that they absolutely do exist, or that they absolutely don’t exist; it’s just that there’s not enough conclusive proof -- for me, at least -- that they do or don’t drift among us. Just because you can’t see something doesn’t mean that it doesn’t exist. We can’t see oxygen, but we know that exists. Same goes for Pluto. Same goes for Antarctica. Can we see any of those things with the naked eye at all times? No. But we can prove conclusively that all of those things are real. That’s what science is for.
And Ideally, that’s what the Ghost Adventures team is for. But proving the existence of ghosts is just one of their big trials -- because against all odds, they manage to make a show about finding ghosts unbelievably BORING.