CURBED SF COMMENT BOX—So about that new comment system ... We can see that you're reading Curbed SF, San Francisco. And yet you've been quiet today. We suspect a bit of reticence surrounding the new comment system. Are we right? Fact: Your email address is used only to verify the account. Fact: This comment system is unique to the Curbed Network, and it's features are actually useful: please see our New York site for an active example. Fact: Avatars are fun in that goofy Nintendo-like kind of way. Social networking can be, too. Fact: We love to hear you mouth off, even the repeat offenders. So sign in, and sign up. Trust us, it's painless.