I have not went into detail about this agreement, but you can be certain, whenever ISP’s ban together to prevent something, it hurts the consumer.
Filtering slows down speeds (minutely), but the real flaw in filtering is the use of a non-certain list. Whitelist or Blacklisting, there are ALWAYS false positives when you do not have an exact plain-text match.
I am definately against child pornography, however, false positives from filtering, and the way some ISPs like to communicate with law enforcement could cause a myriad of problems for everyday households. Prosecution should be done through cooperation with web hosting companies that are hosting accounts with this type of content on it. Filtering is not mature enough yet.
For instance, AT&T customers, this blog post even, might be filtered away in the given year. Just for it’s title.
Filtering, throttling, anything other than providing direct internet connectivity is a horrible breach of trust and net neutrality, boo!

