This article from CNN
discusses how a group is trying to create a symbol as part of mobilizing Internet activists against further SOPA style legislation. But the article brings up another very important point:
"Technically, it's more of a "cat signal," since the group's website, which launched a couple weeks ago, features a picture of a cat's face being broadcast into the sky.
"It's a cat signal because we see the cat as the symbol of the Internet," said Tiffiniy Cheng, co-director of the nonprofit Fight for the Future, which helped organize recent piracy legislation protests and is behind the new site. "There's this academic theory ... that talks about if you ban the ability of people to share cat photos, they'll start protesting en masse."
She added: "The idea is we're building the infrastructure to put up this cat signal or this bat signal all over the Internet at a moment's notice, with the click of a button.""
I wonder if cat is on that Homeland Security list of watch words.