If freedesktop.org is destroyed by earthquake, fire, flood or volcano
Or three sysadmins working together accidentally nuke the RAID array and then realize that they didn't have the tape backups turned on. Not that that would ever happen.
Alternatively, if the freedesktop.org administration becomes evil and starts to manipulate source code to subvert users machines
Or we write some bogus scripts that let someone pwn the machine. I could probably nominate some.
-- Eric Anholt