I think this is a cool idea, and wouldn't be too hard on ES's part. Add a feature to the editor in which you you some simple drawing program similar to paint to create a flag. Create a tech tree, choose the AI and building set, and voila!
If you stereotype children as stupid flamers, I hate you, me being thirteen.
"Physical activity is for pansies. Real men play Age of Empires." - Me
You can rearange the letters in "mother in law" to spell "woman hitler".