> but I'm not aware how big a customer you have to be for your ISP to care about such notices So basically ISP don't want to do anything to prevent misuse of

> but I'm not aware how big a customer you have to be for your ISP to care about such notices So basically ISP don't want to do anything to prevent misuse of their infrastructure because it is more profitable this way. > It also creates a nice DoS vector: if I want to not take an exam today, I'll just do a little ping flood from the school network and get banned for a while. The idea is that you can only block traffic going from school network to your site, but not any other traffic from that network.