Winter 1998
Now technically this isn't an SCP activity because none of the people involved in it were admitted members... however, it was in response to (or at least it was a sutible stimulus for) SCP activities, so I decided to list it here. But anyways, one morning we woke up and discovered that someone (An Alpha Thetatian, per chance?) had been massacred on our front lawn, and that the Police had cordoned off the area with yellow tape... (although the real Police were not too thrilled about that...)