said by Ignite:I think it's well established how much you dislike your customers using the bandwidth you sell them due to the extortionate price you pay for backhaul. ISPs know how much bandwidth they want to allocate customers in both directions and control usage as they need to.
How much bandwidth do you budget per customer at peak times? I am reckoning it's 30kbps or less.
In the case of WISPs, it's not just about bandwidth on the ISP's upstream. 802.11 doesn't deal well with the contention caused by BT. It slows down the air interface, causing issues for everyone even when there's plenty of bandwidth to spare on the wireline backhaul.