Shapiro accused the MPAA of focusing more on "gotcha" Google searches and name calling than on "the serious threat to our nation's economic future posed by this legislation."

The MPAA "went all the way to the Supreme Court to block the VCR, part of a pattern that continues to this day of using lobbying heft and legal might to delay or destroy nascent technology that challenges their legacy business," Shapiro said in a statement. "If the content community is truly committed to addressing illegal commercial counterfeiting without harming the broadband technologies that are driving our economy forward, we can and should have a dialogue about changes to [the two IP bills] that attack the parasite without killing the host."

Also this week, digital rights group Free Press voiced its opposition to SOPA.

"This bad legislation lets a corporation like Sony Music or Viacom become the Internet's judge, jury and executioner," Timothy Karr, Free Press' campaign director, said in a statement. "If the Stop Online Piracy Act is allowed to stand, we could see the private sector's police powers expand to a point that undermines the fundamental openness of the Internet."

The IDG News Service