Where did people go?

Sometime when I'm sitting in the subway, I wonder where everyone went. All the people that I've had the pleasure of knowing throughout my life. For example people who grew up with me at Parkview Public School. Are they all still in Unionville? How could it be that none of them live or work in the downtown areas? Surely at some point I should be able to bump into one of them on the subway.

The fact is I don't even see my old highschool friends on subway. How is that possible, what are the odds of this? I run into church friends all the time. Is it that Chinese Christians all work downtown and everyone else doesn't? What's up with that? I rarely even see my old university friends. You'd think with all the people I've known or met, I might run into *someone* at some point at random.

Then yesterday while looking at Facebook's "People You May Know" tool, it dawned on me. I probably have run into many of my old friends. They've all grown up and don't look the same as they did 20 years ago.