Why? When Facebook is down, you cannot use Facebook to communicate about the issue. That is also reason why FB still uses* irc instead of messenger for coordinating how to resolve such issues.
* Or at least used 1 year ago, when I was working there.
Hmm, I wonder if we could leverage that to make irc more popular again. "FB uses X" is often all the justification small startups need for picking a tech.
