I agree with a lot of this article that says typos don’t matter. Getting overly fussed over typos is silly: it’s the message that matters. And typos don’t have much to do with intelligence and maybe with how good a writer you are (at least, it’s not proportionate – you could be a great proof-reader and an indifferent writer.) (Case in point – I just wrote ‘indiffirent’ in that last sentence and took half a minute figuring out why the word had that red squiggly line under it.) (Though my being a better-than-indifferent writer is up for debate, of course.) And yes, pointing out typos is just a way for other people to mock you and feel superior.
Wait. Back up. Read that last sentence in the last paragraph again.