Could be wrong on this, but I think the C of E membership in the UK is now less than the number of people who've bought Sgt. Pepper.
Cue Lennon quote...
<opinion>
I personally think that religion's obstructive; I don't mind people believing in God, but Christianity is not your beliefs, they're someone else's that a) have been forced/ingrained into you, b) that you're adopting out of fear of going to hell, or somesuch, or c) because everyone else seems to believe, and you're too lazy to come to your own conclusions.
This doesn't mean I'd smash down every church in the land a la Stalin if I got into power, though. Until they become lawbreaking, Churches aren't particularly anything to be reviled.
</opinion>