I encourage network operators (or IX operators, DNS operators, etc) to let
the government know what you think. Mr. Clarke's crew is writing the
plan, and taking input from many sources. If you think RPF (or some other
source address validation) is a solution let them know. If you think
S-BGP is a solution, let them know. If you think network operator managed
firewalls on every DSL/Cable modem is a solution, let them know. On the
other hand, if to think some of those things are not a solution (or a
really bad idea), tell them that.
These are technical operations matters. Seems like there might be some
benefit in formulating consensus views within the technical operations
community.