Some R-71 opponents have put up a Web site – www.whosigned.org – where they intend to post the names of all 120,577 signers.
"We think that it will help neighbors talk to each other," said Brian Murphy, 45, a Seattle man who helped put up the site.
Referendum 71 organizers say the tactic is way over the line.
"It's intimidation, there's no question about it," said Gary Randall, president of the Faith and Freedom Network, one of the groups backing the measure.