Ghost Adventures
I've only ever really seen one Ghost Hunting show and that's Ghost Adventures so I could be wrong about this but Grave Encounters to me comes across as a rip off of GA. I'm not saying that GA is completely original either but they seem to follow the exact same formula and have cast actors who could look like they're playing the GA crew in a reenactment.
I was looking forward to watching this movie but I was instantly put off by the insane similarities to GA, not to mention the terrible acting.