I know this, but I still do it.
So I can end up wondering if someone stopped responding because something got fucked up with their computer or because they just.. uh.. left on me. It happens a lot.
The simple misinterpretations that crop up because of the lack of tone of voice... tiny little misunderstandings that seem *huge* because text can't put on a sympathetic face.
I really really need to learn this lesson.