system
A chat on subreddit /r/NoStupidQuestions
human
It's also a dick move to non native speakers, people with dyslexia, or people who simply grew up disadvtanged. 

If you are going to point it out, at least do so with a genuine desire to help someone and not ridicule them.
gpt
There is much to be said about a simple typo. Unless it's so bad it becomes difficult to read nobody cares.