OTTAWA - Critics of the Harper government's proposed changes to the Copyright Act have launched a cyber crusade to fight the controversial bill.

They're using everything from Facebook to YouTube to Wikipedia to blogs to get their message out. They want the government to either scrap or make serious amendments to Bill C-61 when Parliament resumes next month.

At the helm of the digital movement is Michael Geist, a professor at the University of Ottawa who specializes in Internet and e-commerce law. In addition to his own blog, Geist runs a Facebook group called Fair Copyright for Canada that boasts 90,000 members.

The group, which was created in December, has become so large that members have created local chapters by city and riding to better organize their efforts. Many of the local groups have also developed wikis -- online encyclopedic web pages -- to keep their members informed.

Geist said more Canadians are getting involved because they recognize how the proposed reforms could affect their daily lives.

"We're talking about more than just copyright here. We're talking about the digital environment," he said. "This legislation represents a real threat to the vibrancy of that online environment."

Industry Minister Jim Prentice introduced the bill in June, calling it a "made-in-Canada" solution to online piracy. But critics responded that the bill was a carbon copy of the American Digital Millennium Copyright Act.

If passed, Bill C-61 would make it illegal to circumvent "digital locks" on CDs and DVDs and impose a $500 fine on anyone caught downloading illegal copies of music or movies.

Geist also launched a video contest on YouTube inviting Canadians to give their thoughts on Bill C-61 in 61 seconds. A panel of five judges, including Ontario Privacy Commissioner Anne Cavoukian, will announce the winner on Sept. 15 -- the day MPs return to the House of Commons.

An Industry Canada spokeswoman said Prentice is interested to see the number of Canadians involved in the online discussions, but it's up to Parliament to study the issue further.

"The activity online proves that a broad range of stakeholders, with varying interests and vantage points, care deeply about this issue," said Stefanie Power, in an email response.

The movement isn't confined to the digital world. The online protests have spurred offline activism.

Kempton Lam, a business consultant from Calgary, used his blog and Facebook to organize a rally outside a breakfast hosted by Prentice last month. Lam said the online discussions have fuelled potential activists.

"There are so many Canadians that have issues will this bill," he said. "And the online forum has helped us get informed, which leads to offline rallies.

"After we meet, members write about what we learned, post videos back on to the blogs and Facebook group."

Members of the online movement are also trying to make their voices heard through letter-writing campaigns and one-on-one meetings with local MPs.

Liberal MP Sukh Dhaliwal held a town hall meeting last month to discuss the controversial legislation after his office was flooded with letters from concerned constituents.

It's not the first time this digital community has bared its teeth. The Conservative government was slated to introduce the reforms in December but delayed the bill after heavy criticism flooded the blogosphere.

Geist said he is optimistic that the activism will make a difference.

"When you get tens of thousands of Canadians speaking out like this, there's big political risk for any political party who chooses to ignore it," he warned.