Want to give them a hint that they are not welcome? Follow the link below to the Sussex Police website and you can download and print out your own "Trick or treat, No thanks" poster. Stick it to your front door and VOILA! a quiet night on the 31st. I have done this for the last few years and it does work. Try it.
Posters are also available at the front desk at Horsham police station.
http://www.sussex.police.uk/operations/halloween.asp
Not been egged and floured once.