Normally, I don't like it when people correct silly mistakes like this. Maybe this kind of feedback is useful when publishing a book or sending an important email, but we all knew what word they had in mind. I didn't even notice until you brought it up.

That being said, I can't help but feel some sense of poetic justice that someone complaining about everyone making stupid mistakes that could have been avoided if only they had spent some time thinking, made this stupid mistake.

Although to be fair, they do seem like they feel like there is something incorrect about this behavior ... perhaps it could have been put in a better way, though.