Grammar lesson #1:
There are two types of language usage
1. prescriptive
2. descriptive
The first type is the properly parsed, tensed, spelled, etc word. The second is how people speak.
Grammar lesson #2:
When using descriptive language, people follow the unwritten rules of their location. This is something like a dialect. You will notice that even though a group of miners may use "improper" grammar, you will also notice that they are consistent in their misusage. They are merely adhering to the rules of the spoken word in their part of the world.
Grammar lesson #3:
You cannot accurately gage one's intellect or education by the way they speak when in their own environment. For example, when I am home in Montana, I sound a hell of a lot different than when I am in Seattle. When I am in Denmark, I speak with a strong provincial accent. Basically, I sound like a country bumpkin wherever I go and feel like I am home. So ease up on these folks, okay?