Organizations Opposing Violence Against Adults Who are Attracted to Minors

Canada

Circles of Support and Accountability. A faith-based project run by the Mennonite Central Committee (Ontario) to reintegrate former sex offenders from prisons into the community. See also The Sex Offender as Scapegoat: Vigilante Violence and a Faith Community Response.

The John Howard Society of Canada. The organization's goal is "to understand and respond to problems of crime and the criminal justice system." See especially this page on sex offenders.

United Kingdom

NACRO (National Association for the Care and Resettlement of Offenders). See especially Sex Offenders: Reducing the Risk.

The National Society for the Prevention of Cruelty to Children. See especially Telling Communities About Sexual Abuse.

United States

American Civil Liberties Union. See, for example, this article on the ACLU's concern over vigilantism against sex offenders.