Seems like the Australian government got the right idea. They start taking the ISVs into the responsibility to shut down zombies. There is quite a bit over coverage world wide. At the end the solution to curb unsolicited use of the Internet lies at the access ramps. Unfortunately the definition of "unsolicited" is in the eye of the beholder, so what weeds out a pest can also be used to suppress. I don't think that will be a problem in Australia, rather further up North (much further).