This helps people protect themselves and their families  People can use the information about the offenders in their area to ensure this. It is especially useful to have a modus operandi; if a local offender is known for typically abducting people walking on their own at night, people can alter their behaviour to ensure they always have company, or get a taxi after dark. More direct measures can be taken, by avoiding contact with that person, or avoiding entering into a close relationship with them. Furthermore, more general measures can be taken to be more vigilant, install better locks, and avoid leaving vulnerable people alone. Some studies1 suggest that there is an increase in measures taken to protect other people where this information is given.  1 Zgoba, K., "Megan's Law: Assessing the Practical and Monetary Efficacy", December 2008,