During agreement discussions at IBM, the Italian Works Council asked for a €60 salary increase per employee. IBM responded by cancelling a union agreement, decreasing pay by €1000 annually. This affected 5,000+ employees.
In response to the pay cut, Italian IBM workers took to the internet, organizing a protest in SL. They created an international taskforce in one week's time. Then they spent 20 days and nights planning the peaceful strike.
They prepared strike kits in three languages and trained participants. They also arranged a meeting point for avatars to teleport over to IBM's sims. With only 24 hours notice of the strike, the protesters were ready.
Over 1800 employees and residents joined in on the strike. IBM shut down at least one of their sims in response. They were undeterred, though, and posted their results frequently on their protest blog.
In the end, the man responsible for the pay cut resigned, talks resumed, and the performance bonuses were granted. The protest even ended up being chosen as one of the 100 web initiatives of 2007. More importantly, they made a difference in both real life and Second Life.
To see more about the protest, please visit their IBM Strike History Museum in-world.