As readers of this site know, Greenpeace has quite an active sideline in rating (and berating) technology companies that generate excessive toxic landfill. In fact, we've seen so many of these reports that we almost forgot what the organization does best: chasing down whaling vessels, trespassing, hanging banners, and generally bedeviling polluters in the name of Mother Earth. And now, after repeatedly calling out HP for using PVC and hazardous chemicals in its devices, the group has taken matters into its own hands -- specifically, by slipping into the company's Palo Alto headquarters and painting "hazardous products" on the roof, in really big letters, with non-toxic children's paint. Congratulations to the activist group for finally finding a way to spread their message to low-flying pilots in the San Francisco Bay area! One more pic after the break.

[Via Switched]