Can't you just do an outright ban for those tosspots that use it? It drives me bonkers! Note to the person's doing it. If your crap at English or spelling, then just open another window or MS Word, and look for and use a spell checker. Simple.
Complete and utter agreement, I have never been the most able with spelling and grammar; what with being dyslexic and having attended primary "school" in the 1980's. I do my best however, not to inflict my inadequacies (in this department) on others.
Even on phones, text-speak is rubbish, because almost everyone has predictive text these days. All decent words are short anyway - e.g. "beer", "pint", "sex", "birds", "Llanfairpwllgwyngychgogerychwrndrobollantisiliogogogoch" and so on. To be fair you could probably abbreviate the last one.