In a political climate drenched with debate as well as petty fighting, many people embrace bipartisan cooperation when it makes one of its rare appearances. A no-brainer of a bill feels like a relief, and it indicates that Congress actually has the ability to conduct business in a productive way. The uncontested passage of a bill feels particularly sweet when the bill deals with an emotionally gratifying issue, like the recent creation of a national sex offender registry.

No one urged President Bush to veto this bill. Named for the America’s Most Wanted host’s kidnapped son, Adam Walsh, this bill had all the trappings of legislative gem: widespread bipartisan support, quick, painless passage, and the emotional pull that only arresting child molesters for 25 years can elicit.

The law establishes a national-level database of past sex offenders’ names and locations. Many states have implemented databases of this kind before, but this law penalizes past offenders more harshly for not providing current information, and increases criminal penalties for child predators as well. It certainly sounds like a Congressional slam-dunk, providing all Americans with more access to information, and better protecting the nation’s children from proven sex criminals. Most people would support such a piece of legislation without a moment’s thought.

But any issue that prompts you to think with your heart rather than your head can have disastrous results. Botched legislation has enjoyed widespread gut-reaction support before, after all. And sex offender registries have not had a shining history.…