They've got the rights stuff

• Due process-defending org
• Its website has a Know Your Rights page
• Rights advocacy gp
• Freedom fighters, for short
• Legal gp. cofounded by Helen Keller
• First Amendment lobbyists, for short
• Gp. with a "Know Your Rights" web page
• Opponent of the CAN-SPAM act
• Defender of some unpopular causes, in brief

Wiktionary Word definitions in Wiktionary
n. (initialism of American civil Civil liberty Liberties union Union English)