That must be a "thing", now. I see it everywhere. People are using the plural for woman instead of the singular. It isn't isolated. And, yes, we are most assuredly getting dumber as a nation. The evidence is everywhere, not just in grammatical errors. Mike Judge got it absolutely right in Idiocracy.
“That must be a ‘thing’, now. I see it everywhere.”
And my pet peeve is people saying things like “me and my mom” insead of “my mom and I”; or “me and her” instead of “she and I”. Like nails on a chalkboard! And it’s everywhere — news anchors, ads by major corporations, TV shows. arrrrgh!!