I am an editor by vocation, so I feel your pain. However, I discovered long, long ago that my Grammar Police badge simply doesn't command the authority that I think it should.
It is not just THIS forum; the internet is a haven for editorial laziness and ignorance. But we--the few, the educated, the grammar police--are simply not likely to change this.
What is way more disheartening to me is to see the way our youth write these days, and what English teachers are allowing!
I blame it all on the elimination of sentence diagramming in our schools.
Anyway, here's what I do:
--If I think there is any chance that English is not their first language, or they have some sort of disability, I overlook it.
--If I think perhaps they are posting from their phone, I overlook it (but think to myself, self--this is why one should not post comments from one's phone).
--If I think it is an unusually egregious misuse of the language, AND I think that the individual is usually more editorially precise, then I might point out the error.
--If I find the error particularly humorous, then I put my "snarky" hat on and have fun with it.
--If I think the poster is just a sloppy, lazy, editorial ignoramus then I also assume that they will not care nor change their ways if I point out their errors, so I simply ignore them.
And finally:
--I try to remember that in a forum such as this, grammar need not be as precise or accurate as it should be for a paper. This is a relaxed, casual atmosphere and people are going to type the way they might talk to each other. I do the same thing, using ellipses and run-on sentences and phrases that I would NEVER use in writing.
--I also try to remember that if you choose to point out other people's misuse of the English language, you are putting a target on your back to get attacked the next time YOU make a mistake.
Just grit your teeth and IGNORE the OP. And be thankful that YOUR momma raised you better.