If this law passes, you'll still have the same activity. People will find a way around it. I would find a way around it. Now instead of having sexual predators as criminals, you have website operators as criminals. I'm almost dumbfounded that some imbecile actually thinks this would work.
Then again, I personally can't rule out other agendas unrelated to sexual predators. Laws like this would only be able to be enforced if the 'verified permissions' were verified by a state or federal government. In addition to information collected on each child attending a state school, this could continue the chain of precedents allowing information to be collected and compiled for each person.
Ironically, this is all in the name of protection of rights, the government's supposed role.