My kids are very aware that Halloween candy may be poisoned. Every year, after they finish trick-or-treating they will lay the buckets of candy on the table for inspection[1]. I will then taste several packs to make sure they are safe. If I do not show any side effects we conclude that the candy eaten was good. The kids wait patiently for a couple of weeks as I repeat the process and certify that all the candy they brought was indeed safe. Then I serve the kids salad.
This actually just sounds like a really elaborate "tax" on your children's stash. If you fear the candy is actually dangerous, then perhaps you'd be better off just buying some from the store and distributing it to your kids, that ways they don't run the risk of loosing their parent.
[1] https://instagram.com/p/BMQMFqAjuKr/