God, I hope so. They have to be doing this already. I have no evidence of that but, it would seem to be an effective anti-spam measure.

If they aren't then we need to lobby for it. I bet the reality is that if they went on a grammer jihad (de-index me for that word) half the sites on the net would disappear overnight.

Guessing it's really hard to create a set of rules for this that doesn't drastically impact everything in the index.