Catkin&Golden: One last note on the hack in Lobby 7, especially for those of us who have found 17 Days of Mystery! and/ or 17 -
Turns out that the residents of the MIT dorm Random Hall consider 17:17:17 to be the most random time in the day, and they did gather in Lobby 7 to celebrate the dorm's birthday. The cake affixed to the ceiling didn't turn out to be a piñata though...
Archiving this now that the full story has been told (at least the public version [;)]). Thanks again to everyone who attended!