Proper English is proper English. I know an English professor who gave my sister a "B" for the entire English class she was taking because my sister used some contractions in her final paper. Arguing with English professors and teachers is not likely to be productive. Yes, such expectations of correctness might be viewed as "perfectionism" by some folks, but rules are rules. Also, the rules can change over time, but not too quickly. Even tests to get into college and graduate school have sections on vocabulary and grammar, as I recall. Some tests require students to provide writing samples.

However, I can understand how tiredness and even ADD in combination with it could affect the quality of someone's writing on a post in an Internet forum.

I think we agree we would be better off if we move along. However, truly this post was not one started by me, so Hamster-Bamster is in charge. I tell you, we just bring up one issue on Psych Central, and it can get turned into a battle.