Oh, yes, the “should of” shows up a lot — or “alot”, as too many seem to think it’s spelled. There is, also, the confusion between “your” and “you’re” and between “its” and “it’s”. Then there is my personal favorite “prolly” for “probably”.
My sister wrote a note for me. She said I had a cold in my stomach. The teacher made me stand in front of the cleaning a as to explain what a cold in the stomach feels like. I’m 68 now but still remember being humiliated.
Your right in regard to most of your criticisms. It’s a shame when the populous cannot communicate in there own language.
But I hafta say, a few of the mistakes are prolly attempts at clever dialect, effected for affect. Altho I get what your sayin’. Some righters, like Faulkner, should of put a lid on it. I grew up in the South, and we said “goin’ .” Nobody ever said “gwine”.
Lol! Ha ha! I’ve seen the “prolly” thing before, but I seriously thought it was purposeful slang on FR! Ha!