Sex offender laws may be doing more harm than good. That is the conclusion Human Rights Watch came to after two years of intensive research into sex offender registration, community notification, and residency restriction laws in the United States. Our research convinced us that politicians failed to do their homework by enacting popular laws without seeking expert advice on how best to prevent sexual violence.

Instead of an informed debate about how sexual violence ravages this country, politicians and the media have largely focused on child victims of truly horrific crimes by previously convicted sex offenders -- like the murders of Megan Kanka, Polly Klaas, and Jessica Lunsford. Horrific yes, but uncommon, which means the laws are designed to tackle only a tiny minority and fail to address the full picture of sexual violence.

A growing number of child safety and rape prevention advocates agree that current laws are not working. For example, the California Coalition Against Sexual Assault (CALCASA), a state-wide coalition of 84 rape crisis centers and sexual assault prevention programs, had this to say about residency restriction laws: They "waste valuable resources on sex offenders who are unlikely to reoffend, while leaving a deficit of treatment, supervision, and focus on offenders who we know should be receiving more intense scrutiny."

Two popular myths about child abusers underlie many of our sex offender laws: first, that our children have most to fear from strangers, and second, that sex offenders will inevitably repeat their crimes. But the data tell a different story. More than 90 percent of child sexual abuse is committed by someone the child knows and trusts. And recidivism rates for sex offenders are far lower than most people believe -- authoritative studies show that three out of four do not re-offend within 15 years of release from prison.