I'm not a perfect parent. I'm nothing like a perfect parent, and I've never claimed to be. But I like to think that I would never allow my child to own a toy M16 semi-automatic rifle. And if, by some freak event, I did allow my child to have such a toy, I feel completely certain that I would never allow that child to take it along to an ANZAC Day parade.
Perhaps these people thought that their young sons were entering into the spirit of the day, what with marching people in uniform, and ex-Army Jeeps, and a Catapult Party with rifles. But then to allow them to run around pretending to fire volleys of bullets into one another was insensitive at best, offensive at worst.