mir - i am trying different tactics. All super-heavy users i throw them our from ISP, or they had to upgrade. 90% of them buy high speed home accounts and tried to sell for a network 20-30 PC's. So i concentrate now on this specific case.
Yeah, the problem resides there. Many have been sharing their connection to more than like 5 PCs. I hope you can manage to minimize this type of malicious usage.
Heh, you reminded me of MOBI, when i was about to buy their services, of course, the unlimited account. But prior to that, i was reading the Terms And Conditions, i got stuck to the following sentence:" As part of the “Fair Usage Policy”, unlimited subscribers may be limited to speeds of 16/8 Kbps after 3 GB for the 256Kbps, 4GB for the 512 Kbps plans and after 5 GB for the 1 Mbps plan."

Funny eh?