1) ISP's aren't allowed to censor the internet. Internet provider cannot roll out a preventative filter system that would broadly be applied to all customers in place – at least, not in the case of censoring peer-to-peer file sharing systems that could be used to share music. But the same arguments used in this P2P file-sharing decision would easily also apply to other forms of user-created content sharing systems (e.g. social networks) as well.
2) IP addresses are considered person-identifying information. I guess that means anonymizing server logs is back in fashion now, and server operators may need to re-assess their current logging practices!