Was anyone else online when the Portal 2 thing went down? That was absolutely crazy. The moment I woke my PC up after work it started updating Portal, which was odd for an old game. I went to the forums to see what was up and all hell had broken loose. By the time I finished reading one forum page, three more would have been added. I got goosebumps when people first started to call that modem number.
It was triggered by an odd occurrence, however. I think what needs to be done in situations like these is that the people doing it need to give a hint that something is out there waiting to be found, otherwise people don't look.