Limiting graphics can also help a sites bandwidth extremely.
The size of avatars and signatures in kb can drasticly reduce the bandwidth. It does not mean you should be limited to a 20x20 pixel avater. But if you just limit the kb size that would help.
It even gets the graphics creators more imagination to work with the limited kb in size to see how well they can still create.
For example the website aaotracker.com limits their
tracker banner to 15kb!!!
It seems a bit strict, but with some creativity you can still create some decent banners like these for example.
All five of these banners combined use as much bandwidth as the graghic displayed on the top of this page.
So, as I am suggesting to the webmasters, they can still limit bandwidth just by restricting the kb size in a file to the users. If you only limit the dimensions, you can still have a lot of bandwidth used just because some use animation the size of a small commercial to get there graphic displayed.
Also note, when linking to a graphic not on the site (hotlinking), you are using the websites bandwidth that is hosting the graphic. Use a appropriate image host like imageshack or photobucket to host your graphics to save this sites bandwidth.
None of the graphics I displayed use up any bandwidth on any website except the image host site, UNLESS the site requests that I upload the graphic to the actual site.