Public Knowledge particularly opposed a measure that allowed for the forfeiture of devices used in piracy.
"Let's suppose that there's one computer in the house, and one person uses it for downloads and one for homework. The whole computer goes," said Public Knowledge spokesman Art Brodsky.
Brodsky argued that, at best, the bill was unnecessary because the recording and movie industry had the right to take accused infringers to court.
"There's already lots and lots of penalties for copyright violations," he said. "They've got all the tools they need."
