Unfortunately, these "common sense" laws do not offer any real protection but have the opposite effect of creating a sense of false security. The myth that sex offenders congregate around or take kids away from these places is not supported by research.
Think for a moment, how many survivors around here were victimized by a stranger at a school, playground, day care center, etc? The vast majority of victims are acquainted, live with or are related to the perpetrators. Would such a ban on KNOWN offenders have protected any here who read this?
This legislation is strictly for public consumption. The residency restrictions in other states have been opposed by police and district attorneys as being ineffective and actually driving KNOWN offenders underground/on the run when they are forced to move. It does nothing to protect children from the ones who have not been caught. The politicians who support such legislation get points at the voting booth in November as they are the sponsors of "get tough" on sex offenders. Anyone who doesn't support such legislation is seen as soft on sex offenders.
If you want to know more about preventing sexual abuse, go to www.stopitnow.org.
These folks have been in the prevention business for many years (the org was started by a survivor) and can offer ideas of ways that really work.