My friend has terrible grammar....what do I do?

So the other day me and a few friends were at Bugga burritos(the place where you can eat out a Jeff) when my one friends socked me right in the eye. I said to him "why would you do that?" he responded by telling me to stop correcting my grammar on Facebook. You see, me and my friend Miles are worried about our friend. On Facebook he has abysmal grammar skills. I know for a fact that Colleges look on people's Facebook's, and if a potential College were to look on his, they would think he has the grammar comprehension skills of a Kindergartner. What should we do? He won't listen to reason.