I've noticed many of idiosyncratic modifications of spelling and grammar as well, but attribute it to the synergy between the recent rise of the use of texting abbreviations, phonetic language learning, and the decline in the reading of traditionally edited books.
Texting via a SMS (Short Message Service), often has been billed by the number of characters used, therefore putting pressure on people using it to compress and abbreviate words and grammar in ways never before seen. Phonetic analogs can be used, and therefore became commonplace. My conjecture is that the increased non-standard use of words and language makes the standard usage less common, and more likely that people simply forget or don't care about the traditional structure of words or sentences.
I believe I remember reading a few years ago about a young girl, whose homework it was to write an essay, who submitted an essay written entirely in SMS text abbreviations. Eliminate vowels and substitute phonetic analogs when it serves to shorten the word construction. Obliterate any complicating grammar. I forget what the teacher's response was, but I am sure it was not favorable given the existence of the op-ed about the event.
It has also been reported widely that people read far fewer books than they used to. Without a traditionally edited book providing the usual oversight for standard grammar, punctuation, and word usage, people have fewer baseline references to what is correct usage. Online texts can be properly edited as well, and many are, but there is clearly less attention paid to traditional issues of spelling and grammar in most commentary, personal blogging, or other sources of reading online. Over time, the combination of these three things: (1) greater use of idiosyncratic abbreviations in ordinary communication, (2) greater acceptance of phonetic blurring, and (3) fewer baseline book references, directly encourages this kind of creativity in grammar and spelling.
It must not be all bad, as some of the new bastardized words have been recognized by New Oxford American Dictionary with the distinction of "word of the year". I seem to recall Time magazine has also joined in the fray, celebrating abbreviations such as LOL and ROTFL.