Human Factor (partly!) and Loose rivets, good point. Word/Text plus copy and paste is our best friend.
I'm as guilty of this as anyone but does logging in in the morning and out at tea time (to dip back in during odd slack moments through the day) affect available capacity? Is my understanding correct that bandwidth is only "eaten" during page download and Reply/Post send? In short, If I'm logged in but the computer's not using it (or even sat in screen saver), I am not wasting capacity for others?