Well I thought the Catholics were goning to get a pass on this one but, alas, the Vatican has decided to join the chorus of the silly:
Vatican condemns Hallowe'en as anti-Christian
The Vatican has condemned Hallowe'en as anti-Christian, saying it is based on a sinister and dangerous "undercurrent of occultism".
http://www.telegraph.co.uk/news/newstopics/religion/6467253/Vatican-condemns-Halloween-as-anti-Christian.html
No, not exactly. The usual media distortion in reporting on the Vatican is afoot. For them, anything that comes out of Rome is "the Vatican sez..." See here: http://catholickey.blogspot.com/2009/10/pope-condemns-halloween-hoax.html