I'm not talking about ISPs. I'm talking about site owners. However, the ISP is the next in line for responsibility if complaints are received and they do not do anything about it. But first responsibility falls on the site owner.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi