If you actually believe in your religion, and your religion speaks against calling on ungodly spirits, then of course you would be against Ouija boards since the concept is to commune with spirits. My parents never let me play with Ouija boards, and I do not intend to let my kids play with them since I believe that it promotes a message about spirituality that I do not want to be encouraged to my kids. If other parents think Ouja is harmless, that's their own business, but I don't think that people should be criticized for disliking the thing for religious or spiritual reasons.