Kama, we’re just funnin’ with ya. Welcome to the Straight Dope!
Here’s your big chance to fight ignorance. Your two informants may be a wee bit MISinformed. Ask them why they would believe such a claim, and what hard evidence they have to back it up. (Toxic items on the grocery shelf? Sure, Quaker Oats would get away with that, poisoning people and laughing all the way to bank, those evil bastards!)
Incidentally, I like rice cakes. You have to treat them like potatoes and pasta, they’re just there to hold up the good (and not so healthy) stuff you load them up with.