My pet peeve is poor communication skills. When I read a text, Email or posting on a forum that makes no sense at all, that drives me crazy. A complete lack of punctuation, capital letters, and poor grammar and spelling don't help either. Don't get me wrong, it's not like I am the grammar Nazi, I just don't like it when I am left scratching my head wondering, "What the heck did he mean?"
There are more and more people that are too "lazy" to type so they use voice to text. No punctuation and incorrect translation.
Don't get me wrong, if someone "has" to use it due to a disability, then okay.