In Prince William County, which contains the second-largest school system in Virginia, 86 schools have implemented an electronic visitor check-in system to keep tabs on visitors and instantly check them against a 460,000-person-long list of sex offenders from across the country. The system, otherwise known as the Raptor, will note when visitors enter and exit the building and keep registered sex offenders off school grounds. These security systems are not unique to Prince William County, either. In Anne Arundel County, the Raptor has ensnared three sex offenders and led to one arrest. And by the end of the school year, officials in the Loudoun County school district want to install video cameras and intercomes outside school doors so that all visitors would have to be buzzed in.

But these systems don’t just screen visitors. Security programs can also store information about parental custody, add up volunteer hours and more. And while immigrant-rights activists have expressed concern about the possibility of the Raptor checking for immigration status, the Raptor is not connected to any immigration database. Plus, parents don’t need a US ID to see their kids at school, although they would need a foreign driver’s license, a passport, green card or rentry permit. However, as of now, the only people who should worry about potential problems as a result of the screening program are sex offenders. And the Raptor, which is currently in use in approximately 4,000 schools around the US, catches around 25 sex offenders each day.