It is odd, I think, that the USA, a country that prides itself on religious observance, should take such a festival to its heart. The day was something that came out of Celtic mythology and paganism. Now it is hard to hear an American mention All Saints Day in connection with Halloween and a similar occurrence is manifested in the UK.
I am not opposed to Halloween so long as it remains cheerful and fun. It is when the game of Trick or Treat becomes something akin to "demanding money with menaces" that I raise my eyebrows! So I would like to see, at least for Christians, a return to a full understanding of what today and tomorrow are really about.
Oh, and a word for the poor old pumpkin! Don't waste it, please! Especially in the UK!! Do as a lot of Americans do, make pumpkin pie or pumpkin soup. Both are inexpensive and I guarantee, once you've got it the way you like them, you won't say no again!
http://www.jeremiahproject.com/culture/halloween.html
http://www.pumpkinnook.com/cookbook.htm
http://www.bbc.co.uk/cumbria/features/halloween/pumpkin.shtml