I think most people do, and sometimes due to many posters posting at once their post can get lost and become out of context. I do think it's good practice for posters to quote the post they are talking about though oldcow.
Oooooo I'm a ghost... be scared.
"Every joke is a tiny revolution," thought George Orwell. "Whatever destroys dignity, and brings down the mighty from their seats, preferably with a bump, is funny."