Sex Offender databases do not achieve their objective and perhaps contribute to possible future offenses...
99.9% of sex offenses against children are perpetrated by family members or close family friends, not strangers. Sex Offenders, in general, are not drooling perverts waiting for any opportunity to snatch your kid.
In many instances sex offenses have a lot to do with wrong thinking and social awkwardness. Making it impossible for sex offenders to find gainful employment or a place to live only serves to feed the feelings that fueled their offense in the first place.