Shifting the blame of course! lol Well if they're illegally capping or blocking or shaping the network without prior notification then they will lie beyond their teeth. They can be reported if they are found out to be cheating users without prior notification. I believe if they are guilty they face a stiff fine by the government regulatory body! It's happened before with at least one other ISP in USA. The same would happen in my country - they'd also risk losing their licence to be an ISP here.

What's more they could face class action by their clients in a personal sueing case for breach of contract amongst many other things. They would be liable.