Popular online services Tumblr, Reddit and Mozilla (creator of the Firefox browser) have come out in black ^[1] against SOPA, the Stop Online Piracy Act now making its way through Congress. It’s part of a no-holds-barred campaign to stop the law, which would make service providers much more liable than in the past for copyright violations. Under SOPA not only would a user posting copyright protected video in YouTube be subject to legal action, so would YouTube (which is owned by Google).

Tumblr in particular has gone all out, blacking out all user-generated content on its home page and inviting users to let the service connect them by phone to their congressional representative. They also get a recording of Tumblr CEO David Karp suggesting some talking points and thanking the caller for “doing your part to protect the Internet.”

Read more at Mashable ^[1].