Boost mobile "Where you at?"And company names with intentional misspellings to seem tough, or street, or whatever. I'm not gonna hire anyone with the word boyz, pawz, dawg, or any other blatant grammatical error regardless of reputation.
I learned in the 2nd grade that you don't end a sentence with a preposition.
"To boldly go where no man has gone before" or, to split infinitives with zero regard to grammatical rules for writing.
My mother is a preK-5 grade teacher and my sister has a BA in English lit and an MLS. Poor grammar and spelling were totally unacceptable in my house.
Ask the average twenty-something to write you a proper paragraph using only pen and paper with no thesaurus suggestions, grammar checks, or spell check. Wait for the hilarity to ensue when you get the result.