Indeed I joined on September 11th. I was meaning to join FR but kept forgetting. On 9/11 I overheard a group of people making light of what happened on that day in the most disgusting way possible. They seemed to find the images of people falling from the towers amusing.
When I got back to my computer, I went to FR and signed up. (And yes, I did tell those "people" what they should do with themselves)