Screw the facts, we'll wet our pants if we see those nasty guns!"
Instapundit linked to the first, Tim Blair to the second.
"We teach children about how bad guns are and yet we are being put into a position where we have to explain why there is a man in the car park carrying a gun bought across the road."
How about "Because, dear, not everyone is such a wussy as your father and I."?