This is one of my pet peeves on the Internet.
As a stickler for proper grammar usage, I generally overlook poor grammar, which includes subject-verb disagreement, misspellings, inappropriate punctuation, etc.
I do this UNLESS someone knocks another for his/her poor grammar and then exhibits poor grammar himself/herself.
It has been my experience that when people call others IDIOTS, MORONS, STUPID, etc., invariably, many of their posts also have grammatical mistakes, misspellings, etc. And I'm thinking, "How are you going to call somebody else an idiot or moron and you haven't mastered the basics of grammar and English?" And if I feel like it, I call them out.
We really shouldn't go around calling people idiots or stupid because NO ONE knows everything, and EVERYONE is an idiot of you take him or her out of his or her field of knowledge.
It's silly Internet chatter and a manifestation of the keyboard warrior mentality.