Hello grammar Nazis, please take a seat in the corner over there. Feel free to give the corner any name you choose, call it left corner, right corner, top-left, north-west corner or feel free to call it the "genius corner" or label it the "dunce corner" with just the right amount of a sarcastic upper lip. Yes clearly I'm aiming to be transparent here.
The problem with grammar is that it like fencing a river. Yes rivers can be directed or run through wandering watercourses, provided the fences are strong and bold enough, but at the end of the day the river still flows from its origin to its finish. Language is much the same way. Whether two 13-year olds text message in a shortened form that causes a wizened wizard of english to mourn his life, or whether a courier stammers in part pidgin to a sub-editor awaiting a manuscript, in either case language is communication, and the message is the only important thing.
Now of course, I hear the cry of the grammar gestapo. "But grammar helps the message you say!" - cue the bloody feud between which form of grammar is the purest and marvel as each proponent paints their puritanical pathways propped up by parentheses in order to fortify their formidable fiefdom of proper punctuation. Boil it away and see where lies the basis for these rules. Somewhere in Samuel Johnson's mind, in the past history of the British upper class using another tool to put down the poor. That is the history of language and yet no matter how powerful it becomes, words and names will take precedence. No matter how many misplaced colons precede or follow it, New York has a meaning in each person's mind. The same goes for many terms, the tone of which is often known only by the reader and of course the name of the author itself often conveys far more meaning than any semi-colon. If you doubt that then ask yourself if a sonnet by Shakespeare outweighs Paul Smith's poetry and you'll have your answer.
So in summary, and restatement, the message is the key part of language, and like music or art it is controlled by the artist. Yes there are basic principles which need to be followed, but next time you find yourself debating a colon versus a semi-colon consider whether that hot air is better served as a by-product of more important exertion.