Have you ever heard that writers should never end a sentence with a preposition?
What do you think?
It’s effectively become a defunct rule, and in writing (especially in fiction), you can justify it as dialect.
I suppose, however, for the SATs and standardized tests, such things would actually matter. Other than that, I can’t fathom of a moment when ending your sentences with prepositions would result in some negativity.
Also, you could probably use such things in your writing to denote different classes of character. I once wrote a tiny piece where characters from the upper class were more “educated” and thus spoke in flawless grammatical form. The ones of lower classes were often annoyed with the upper class because some of their sentences were absurdly long in order to avoid ending sentences with prepositions.