There are sick people in this world. They lack the mental capacity to reason, to empathize, to connect with others. Some we medicate. Others slip through the cracks until they commit a heinous crime. Some we medicate but they cause serious harm anyway. Think Virginia Tech. Think Columbine. Think Cheshire, Connecticut, where career criminals stalked, beat, raped, and murdered the family of Dr. William Petit July 23 before setting their house on fire and attempting to drive off.

After we mop up the blood we ask why it happened and we blame ourselves as a society. Contrite lawmakers create more bureaucracy for would-be killers who wish to buy guns. We seem to be doing something, the anxiety subsides, and we hardly notice we're letting the sickies rule the day.

We kid ourselves that even the sickest among us is reformable, that they will act in a healthy way with the right combination of pills and jail time and maybe some therapy. We paper over their cracked minds and then are surprised when the fissures show through.

Sitting among some mothers at the pool the other day while our daughters swam, the topic of safety from sexual predators came up. One of the women had been online and discovered that a man convicted of sexual assault lives on the Main Street of our little town. Our conversation focused on how we keep our kids safe and how we protect their vulnerable souls in a society that places convicted perverts in our midst.

The very existence of the federal sexual offender registry points to the problem in our thinking. The registry puts the onus on the individual to find out if there are any perverts in the neighborhood. We should find this out because we know these people are likely to re-offend, that they can't be cured, that prison does no good. Nevertheless, they're allowed to live right alongside our children.

Why won't we accept the fact that sick people shouldn't be mainstreamed? The presence of such people skews our sense of normal. It's normal to keep your children under constant surveillance lest they be kidnapped and molested. It's normal to spend hours poring over lists of perverts to see where they are in your community.

It's normal to accept the pervert, the stalker, the pedophile, and other pathological creeps as a neighbor because--well, why? It's a waste of time to wonder why sick people do irrational, cruel things to others. They do it because they're sick. We make ourselves vulnerable by believing the right combination of medication, therapy, jail, and rehab can make them well or at least harmless. We'd be better off by acknowledging that sick people do sick things and we suffer if we open the door to them and pretend they're normal. We might even acknowledge their humanity if we accept them for what they are in all their sickness; in so doing, we might even respect our own.