Do you ever see people who look like people you know and wanna talk to them until you realize that you actually don't know them? I do.
Have you ever talked to some random person who fits the criteria listed above? I haven't. I should sometime. That would be SWEET. Freak out the strangers.
Even better, talk to them as if you know them, and then when they don't know you, act all offended. They'll be like "wtf?". Right?