Sammael99 writes: A study into near real-time bandwidth usage in a DSL broadband network tracks user-by-user data consumption and bandwidth usage in parralel. It determines (amongst other things) that over 20% of customers punished by data caps cannot possibly have contributed to congestion. Link to Original Source
"A complex system that works is invariably found to have evolved from a simple
system that worked."
-- John Gall, _Systemantics_