You've probably already seen the list of most dangerous toys. I like James Lilek's take on it:

One of the toys to which the director objected was "Rock 'em Sock 'em Robots," - the commercials of which were a staple of my childhood. The cry of "You knocked my block off" was as common in the playground as the plaintive lament "You sunk my battleship!" Yet none of us grew up to be mass murderers. John Walker no doubt played with neither the Robots or Battleship, and spent his childhood moaning "You negatively impacted my self-image!" and "You scuttled my Rainbow Warrior!"