Here's a poser for you: you're trying to knock together a TV ad highlighting the effects of war on children. What's the plan? Well, you could go down the traditional route of earnest voice-over accompanying footage of said kids miserably awaiting a better life or, on the other hand, you could arm up a squadron of attack aircraft and go and raze a Smurf village to the ground. Let's face it, it's a toughie. Not for Unicef Belgium though, which earlier this week reduced an enchanted Smurf hamlet to smouldering rubble - much to the horror of some TV viewers...