I have performed many white hat OSINT collection projects for clients to determine the publicly accessible information signatures of executives, sensitive facilities and operations. One of the more interesting vulnerabilities out there is the Progressive Insurance website. Their auto quote system links to the Department of Motor Vehicles - DMC (in the US). So, anybody who knows your name, address and phone number (very easy to find online) can enter the info into the Progressive site and it will provide a DMC listing of the type, model, year and color of your car. A nice little OSINT tool for recognition and surveillance.