The kind of problematic grammar I have in mind is things like "had went"...
ex: "I had went to the store yesterday..."
There were quite a few of these kinds of problems with grammar that I was hearing from the people around me in the areas where I lived and shopped (Fort Ashby, Keyser, and Romney in West Virginia, and Cumberland and LaVale in MD... Garrett County in Maryland is a whole other matter). I started keeping track of these kinds of things to see if they were very common, and I found that they were not only common, but they were generally considered the norm. And that's why I started paying attention to how the educators were speaking. And what I found was that they were making all of the same grammatical errors that the other people were making, and by doing so, they were passing them on to the next generations of people.
And that principal, whose job is to ensure the students' ability to make their way in the world outside of West Virginia as well as within it, had so many of those kinds of errors strung together, her phone message was completely incomprehensible to anyone who was not born and raised in that part of West Virginia.
But still, and the reason West Virginia is the state in the spotlight in this thread in relation to its use of English, is because of it's new law declaring English to be the official language of the state. If it's going to be doing something like that, it should expect criticism if large numbers of it's native citizens don't have an adequate grasp of the language themselves. Maybe the government's time and money would be better spent working on providing better education for all of its citizens, rather than working to exclude many of its most recent newcomers.
P.S. I got an idear, Claymore, you wanna pahk ya cah down't the haba, go't the stowa, get a coke? Or get a drinka watah at the bubblah? (Says the woman from Rhode Island).