It's bad punctuation that gets my goat. I find badly punctuated or, more likely, unpunctuated text incredibly difficult to read and understand. But then that's why we have punctuation. My former boss bought me Lynne Truss's book "Eats, shoots and leaves", which I loved. I can spot a misplaced apostrophe a mile off. It's funny how folk will tolerate poor spelling, punctuation and grammar in e-communication but wouldn't in the written word.