Clearing the Slate: usernames

Continuing my effort to clear out my Firefox tabs and my brain, let's talk about usernames.

yuki_onna posted about this a little while ago, and I have to say I'm on her side. But first, let's talk about the original poster's argument.

I feel like pretty much everything he says can be turned around from a positive into a negative. True, on Facebook you don't have the problem of signing up only to find your customary username has already been taken. Instead you have the problem of signing up w...