Please help the cause by displaying the following notice on your front door.
KIDS ARE WELCOME TO TRICK OR TREAT HERE IF THEY HAVE MADE AN EFFORT WITH THEIR COSTUMES.
IF, HOWEVER, YOU ARE A BUNCH OF TEENAGERS IN TRACKSUITS WITH ONE RUBBER SKELETON MASK BETWEEN FOUR OF YOU, DON'T BLOODY BOTHER.
Bit of a bugbear I suppose, but when I were a kid we used to make a proper effort (well, our parents did), spend ages on our very own Flibbertigibbet outfit, construct our own dolmen to commune with the spirits of Samhain*, chop our own heads off, things like that, I used to love nostalgia, etc...
* Please note: If you use a different spelling of this word, one that you feel more accurately expresses an ancient celtic tongue, good for you. However, please don't lecture me on using the spelling I chose. I know there are different spellings and that some experts don't like the one that seems to be the spelling opted on by the gestalt. That's cool, but can I just use the spelling most people use so that there might be a vague chance someone might get what I'm on about? Ta.