All ideas of what constitues grammar are of course redundant. We have more unmediated and unedited written language available to us than we could have imagined 20 years ago. Probably the most varied examples are comments on Youtube, these come from all over the world, often in a variety of languages. It's interesting to try to find some common thread in the way they are written, but difficult.
Any attempts to pin down grammar are doomed, because by the time you've put it into print, it can be undermined with a thousand examples. Textspeak is one example, now mutating into tweets. I think we will look upon the period when it was difficult to print and distribute words as a golden age. Without the idea of an Editor, we remove the inhibition of working to an internal Editor. If there are no objective standards, why put up with the bother of maintaining your own standards in an age when we are all our own vanity publisher?
Damon.