I'm a copywriter at heart, so I often think about how words on paper will "sound" to the reader. And I like to think about how to make the most of their appearance, too. I'd argue that some of the most interesting- and eyecatching- copy written took some liberties using the English language.
I'm pretty Freewheelin' with My Capitalization. And I really like. Using periods. For emphasis. I even have the upfrontery to make up words, because I like the way they look- and sound.
If you're a writer, and you're trying to make a point, consider manipulating the English language in a way that suits you. You'll stand out. The Word Police of the world may not like it, but they're not the ones getting paid to write for a living- you are.
You don't have to throw away your AP Style Guide. Just put it on a shelf. As a reminder that someone, somewhere, made up all of those rules, too.