I only use shorthand typing when I'm actually really desperate or can't be bothered. I use 'Ikr' and 'lol' but that's about it, really.
But,I just hate people who use shorthand typing on a regular basis. I also hate people who don't use grammar enough. An example of what people would write (and what I have to live with -_-), just before I literally have an emotional breakdown due to the bad spelling, grammar and shorthand typing, would be like this -
"hi bbe how r u lol dat was funnii earlir 2day im stil laffin lol"
It literally just kills me.