Was reading the article and, in true wiki fashion, click the links that seem relevant to get more context. As is often the case I ended up in some other corner of the internet watching interviews with Stephen Pinker. Something in all that input triggered a thought when I read your comment:

What is really the difference between spelling a word wrongly and using a non-dictionary word to express something. We except one as "slang" but will criticize the other because they don't comply with established rules. Isn't that what slang is? A break from established rules.

Anyways, just a thought, because I agree with you; if you publish - proofread. I just find it interesting to throw a Socrates argument at myself from time to time.

Btw and somewhat of topic.. this was the Pinker interview that was most interesting:

https://www.youtube.com/watch?v=egU0dxzFKAQ