The Motion Picture Association of America, another support of the two bills, said it agrees with the league about the need for a healthy Internet.

"In order for the internet to work for everyone, we need to set balanced policies that help protect hard work while still encouraging the freedom to create," the MPAA said in a statement. "The creative community, like the tech community, is built entirely on ideas and innovation. The free flow of information on the internet is critical, but it can't be promoted at the expense of creators and their rights."   

The group will initially focus on copyright enforcement bills, but it will also use online tools to mobilize in response to other government proposals affecting the Internet, organizers said.

An Internet blackout in January protesting SOPA and PIPA "really showcased what democracy is supposed to look like in the digital age," said Rainey Reitman, activism director at the Electronic Frontier Foundation. "It showed how engaged, politicized Internet users from all over the political spectrum could speak out, not in one voice, but in a whole range of voices."

Except for "a few notable exceptions," the U.S. Congress isn't keeping up with technology issues, she said. "That's incredibly dangerous. It's dangerous for the future of this country."