Regulation by Specifying an Instance
Engineering principles which served the Internet well (such as decentralization) also made it difficult for governments to regulate.
In the CDA hearings, the DoJ certainly tried strategy #1 with the argument (based on Dr. Olsen of BYU) that IPV6 would support an adult/minor tag in each datagram, but failed.
PICS, based on principles of decentralization and user control, was seen as a better alternative
However, now there is fear that PICS builds censorship into the Net.