The thing is if you were yelling 'mong' at a group of downs syndrome kids then obviously the word is being used in an offensive manner. Despicable.
But come on. We can all see that Turks is using 'mong' or 'mongboard' in the same way as people use spaz, spastic, retard, tard, f*ckwit, joey, scopey, der, dinlo, moron, freak, merrick etc etc
Shall we be outraged when someone uses c*nt, tw*t, f*ck, w*nk, c*ck?
Would you rather be a bit of a mong or a useless f*cking c*nt?
If the word is so offensive, add it to the swear filter. Simple.