Just saw this movie for the first time, and two things bugged me:
OK, so, ghosts take your kid away, you get the kid back. Umm - why would you stay in the house? Yeah, the mystic lady said it was clean, and they were starting to move out, but seriously - once I got the kid back, I would leave all my stuff and immediately get the hell out!
Also, they discuss what a "poltergeist" is in the film, and the place is obviously haunted by ghosts, not a poltergeist, so the movie seems inappropriately named.
Just had to get that off my chest.