You realise this is easy, right?
Laughably so, yes. But I'll keep doing it until it stops working. If I ever had to fight a trained fighter... oh man, I don't know what I'd do :P
Usually, but not always :P
This brings me to my next point: While I believe one usually shouldn't kick for the face in the same way one usually shouldn't punch for the knee, if it is advantageous to kick someone in the face... kick someone in the face. I don't advocate not being able to kick people in the face, and I don't advocate never doing it per se. I do advocate using discretion, as face-kicking is often suboptimal.
you can quickly and unexpectedly demolish someone's face.
Another excellent point. Being unpredictable is as essential as predicting your opponent. For that, face-kicking may be a good idea.
*cannot speak any Asian languages*
Hung ga is a style of kung fu that specializes in being better than whatever crap Strop practices :P/jk/italickiddingfont. Check it out on wikipedia.
Wong Fei Hung is considered to be the founder of the style. Naturally, the history of Hung Ga - like anything else - is a bit more complex than that, but it's a good working definition.
Going back to writing now...