Could just be me, though.
Did you ever stop to think that Tony the Tiger is a carnavore? He can't live by eating Frosted Flakes, but he's too big and strong to be starving. How can this be?
He acts all friendly with the kids, and gives them Frosted Flakes to eat. They eat, get hyper, and run around alot. People get used to the sound of the screaming kids. Then, when the sugar high wears off and the kids are tired, Tony grabs one or two, carries them off (they trust him, because Tony's their friend), and eats them. If the kids scream as he eats them, people think it's just the hyper kids screaming again and ignore it.
Although, you're right.. it does sound like something that Nancy Ragan spewed on about in the "Just Say No" campaign...