The Five Levels of ISP Evil
schwit1 writes "Recently a number of ISPs have been caught improperly redirecting end-user traffic in order to generate affiliate payments, using a system from Paxfire. A class action lawsuit has been filed against Paxfire and one of the ISPs. This is a serious allegation, but it's the tip of the iceberg. I'm not sure if everyone understands the levels of sneakiness that service providers can engage in."
It's not just that it shows ads, it breaks lots of internet services.
People seem to forget that the web isn't just HTTP, and there are quite a few other things that do DNS lookups. And weird stuff happens when a name that doesn't exist resolves, and the connection is directed to an ad server.