[darthrupert]

Don't criticize this idea without informing us of a better way to protect against the worst offences of modern internet life.

Privacy advocates don't seem to get it. There can not and will not be a future where these people can hide in the net. Either somebody figures a way to catch them without hurting the privacy of the innocent, or we will use systems that hurt the privacy of the innocent.

There is no third option, so put your energy into finding a solution that satisfies the first option if you care about this so much.