Even better
give the obnoxious ones boullion cubes. They're wrapped in bright foil and look like candy, and will give an unpleasant surprise without being even remotely dangerous to the kids.
( The Resident Loon Not a demographic. Do not measure., Tue 28 Oct 2008, 14:46, 1 reply)

Loon
Since you seem to enjoy British vocab, over here we call them stock cubes - or more often OXO cubes (for the same reason we call vacuum cleaners 'hoovers').

But yes, it's a good idea, and one I've thought about in the past. I've recently moved into a flat block though, so unless they try the phone-entry system I won't be disturbed this year.
(annexed, Tue 28 Oct 2008, 14:58, closed)

Stock cubes
is a good term for them. Thanks!

I once had a kid answer the door while I was escorting my daughter around, and he gave me one of those shock pops that's super sour and contains a small amount of ammonia (I think). He insisted that I eat it right then and there.

I did so with a smile, my face never twitching in the slightest.

The kid's jaw dropped, and he had to try one himself to make sure of what he'd given me.

I just smiled more when he gagged.
( The Resident Loon Not a demographic. Do not measure., Tue 28 Oct 2008, 15:03, closed)