Sites could also customize policies for specific pages, something difficult to accomplish previously. But many more sites will have to embrace P3P for it to become useful for consumers. Polonetsky said DoubleClick is working on writing P3P policies and plans to encourage partners to do so as well. The Web consortium plans to release P3P in three to six months. Daniel Weitzner, head of its technology and society group, said the consortium would initially target the 100 largest sites in hopes of pressuring others to follow.
Skeptics question how well social and business practices can be boiled down to bits and bytes.
Weinstein worries consumers may have a false sense of comfort if they mistake privacy statements for privacy protections. There is also a lot P3P can't do. It can't address sites that go out of business and try to sell assets, including customer lists. Nor will it be able to detect dishonesty. Developing the basic technology for P3P was the easy part.