You raise a good point- IANAL, but I can see this being a good avenue for challenging this soon-to-be law. Per COPPA, you have to confirm that someone is 13 years of age before collecting information on them.
What are they going to do, repeal a law that was sold on the premise of "think of the children"? Sounds like something that would come up during re-election: imagine a "Rep. X voted to make it easier for online predators to find your children online" campaign.