It didn’t take a whole lot of social engineering for people to give up their passwords: ask them what the password consists of (like it’s my cat’s name and birthday), ask the cat’s name, ask a deflecting question, then ask for the birthday.
Sneaking in near press/employee access points without going thru them, zigzagging through corridors, and once carrying a box so someone opens a door for them, two jokers from Savannah State University social engineer their way into Super Bowl XLVII for the most part simply by looking like they belong.