You probably know what Bacn is, you just don't know it yet. Bacn is a new problem filling all our e-mail inboxes - it's the e-mail you receive that isn’t spam and isn’t personal mail.
According to the folks at Bacn 2, it’s notifications of a new post to your Facebook wall or a new follower on Twitter. It’s the Google alert for your name and the newsletter from your favorite company. Sure, you want to know if the cute guy from the gym found you on Twitter so you can log in and comment back, but that Bacn you received after his comment is clogging up your inbox and inadvertently making you hate him already.
In most cases you can opt out of receiving Bacn, but then we wouldn't have anything to complain about, would we?