Some online advocates are concerned that anti-spam measures will end the free flow of information - the first principle of the Internet. Marv Johnson, legislative council for the American Civil Liberties Union, worries that the ability to speak anonymously on the Internet is put at risk by legislation that makes it illegal to mask a sender's identity or forge routing information. This would criminalize the actions of people who have a legitimate reason to hide their identities, for instance dissidents under oppressive regimes, closeted gay teens, or government whistle-blowers.