Astute, huh? I am not so sure about that. The Chimera server has probably more people on it then quite a few of the US ones. But if you want to go to a server with even fewer people, here is what you do:
-make a character
-when it asks you to pick a server, look at all the ones that say "light server population"
-Find the one with the name that doesn't sound like a sports car or an anime character or a weapon or anything else that draws people to it (like Naritus) and join that one.
-Pick a starting city other then the capital of each planet. You will probably only come across 1 or 2 people an hour whilst travelling around.
Since the "least populated server" changes hourly, you can't do much better then that, since SOE masks how many people are playing on the servers.