Viper's Lair has published a Bandwidth Capping Article

But bandwidth capping at ridiculously low limits isn't a solution for the long run since the majority of those who have limits don't seem to understand that with the speed of broadband it is entirely possible to use up your quota in few days with gaming, streaming media and entertainment. How many of you like surfing for wallpapers for your PC? Looking at a couple of hundred 1600*1200 bmps or jpegs can eat into your quota quite rapidly.

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