This is true. I personally know (and worked with) the exorcist in our state and he confirmed that playing this "game" opens the door to demonic activity and attachment.

Also interesting for those unaware, antiques brought into your homes can bring with them spirits. We had an antique chandelier that we inherited when we bought our new home and removed it and brought it to our office building to store it. We then started hearing voices moaning and saying "hello" but were unaware where they were coming from. We brought a priest in to help and he stopped in his tracks right next to the box housing the chandelier, and asked if we had any antiques in the building. He then explained that spirits can attach to things. He cast out the spirits with prayer. (Chandelier then went in the dumpster.)