I do this on the forums and on places like FaceBook where the writing is very informal. I try to write on here like I speak, so I can get things across the way I want them heard.

Now in my articles I write more formally. I have fought the urge to put smilies in at times.

I do think there is a major difference between writing an article or book for a readership and writing discussion notes on forums though.

I agree Michelle. If it's totally informal such as a forum or an email to a friend, then it's ok to use a more relaxed writing style.