I haven't seen it, but I read that they posted the following warning sign outside the theater at the Chicago screening:
"Warning: The film you are about to see is psychologically and emotionally disturbing. People who have attended early screenings of the film have complained about many unusual circumstances that they have experienced after seeing the film. Due to our concern for your well-being, we have invited Father Malave to be here. He will be available after the film to provide spiritual support and/or conduct a personal blessing should you feel the need. Please do not hesitate to seek help. Ask a representative where you can sign up for a session with our priest."
From :
http://www.dreadcentral.com/news/68210/chicago-screening-...
I know, it might all be part of a publicity stunt, but still, if it were me, I wouldn't allow any one in my family to see that movie.