I myself also recall a childhood fear of this very thing–the notion that the candy would kill me or that a razor blade would be hidden in my fruit.
The fear was only inspired further by the scene from HALLOWEEN 2 (not the Rob Zombie version) of a boy in a pirate suit being taken to the hospital for his mouth bleeding..
Those fears that we have, ingrained in us from an early age thanks to modern media and pop culture.
And today,
I still check the candy every Halloween night..