Only really young uns round our way, all dressed up, with their parents, only chapping on the doors of houses that had made some effort at around 6 o'clock or so.
On my Mum's estate it's very different, with lazy teenagers in the rubber masks they won at the local fair knocking on every door on the estate 'til 10pm expecting something for nothing.
@dar - you sound disappointed m8, like you're sat there with a good trick all set up waiting for a victim
One of my old teachers rigged up an old vaccuum as a flour cannon and blasted us one year