What are the odds of having four strangers wearing same design of shirt?

Well three of you are gonna have to change

How sure are they that they are not extras in a cheap video game?

Well when it's a simple design

What if they aren't strangers but a group? I mean they're all really close to each other

welcome to the world where everyone shops at Wal-Mart.

One in four?

Idk...I recall in 2008 I saw a bunch of people vandalizing a store, and like 8 or 10 had that "Hope and Change" shirt.