Anti-pedophile activism encompasses opposition to pedophiles, pedophile advocacy groups, child pornography and child sexual abuse. Much of the direct action classified as "anti-pedophile" involves demonstrations against sex offenders, groups advocating legalization of sexual activity between adults and children, and internet users who solicit sex from underage teenagers.
In 2000, some local groups took to marching in opposition to the locations of various child sex offenders following a media campaign of "naming and shaming" suspected pedophiles in the United Kingdom. In the Netherlands, the pedophile activist group Vereniging Martijn has been protested against by the far right Nationale Alliantie. In the UK, the far right National Front party was protesting in front of Paedophile Information Exchange conferences in the 1970s and against the Rotherham Muslim paedophilia scandal in 2014, alongside EDL and BNP. There have been incidents in which vigilantism intended to be against pedophiles has been mistakenly directed against the wrong person, including:
Jewish Community Watch, a New York City-based organization focusing on prevention of child sexual abuse in the Orthodox Jewish community, received mixed support over their posting the names of suspected pedophiles on their main website. The column titled the "Wall of Shame" listed the names of individuals suspected of abuse, their photos and testimonies from alleged victims.
Letzgo Hunting is an Internet-based anti-paedophilia vigilante group based in Barwell, Leicestershire, England. A man committed suicide days after being accused and "named and shamed" of being a paedophile by the group. Jim Gamble, formerly chief executive of the Child Exploitation and Online Protection Centre has described the activities of the group as "deeply disturbing".