Members of the loose-knit hactivist group Anonymous are encouraging an Internet Blackout Day in protest of the controversial Cyber Intelligence Sharing and Protection Act (CISPA) which once again made it through the House of Representatives late last week.

The group organized a similar protest last year against the Stop Online Privacy Act (SOPA) which saw support from more than 7,000 websites across the net. Prominent web destinations including Reddit and Wikipedia took part in the protest with the latter service closure affecting some 100 million visitors to the English language version of the site. SOPA was ultimately done away with although CISPA shares a number of similarities.

This time around, Anonymous is asking participants to replace their regular pages with a notice that explains why their site isn't available. The group is also encouraging site owners to reach out to fellow site owners and try to persuade them to do the same.

CISPA recently passed in the House of Representatives on Thursday with a vote of 288 in favor versus 127 in opposition. The bill still has to make it through the Senate and if that is successful, it would move on to the White House where it will likely be vetoed in its current incarnation.

Those in favor of the bill believe it would give the government a direct route to targeting dangerous individuals without having to bother with warrants and subpoenas. Those against it feel it's too broad and would be catastrophic to privacy laws as well as the fourth amendment.