my $0.02 cents...
I don't think reading forums like these uses much bandwidth...
but if someone in your company listens to things thru the web...
radio, news, video,... streaming.... then they'll suck it up BIG TIME !!!...
but yeah... options like cache the page, automatically re-load page (will not re-load everything everytime you hit reload... and loading images, ... etc. that can take down the bandwidth...