Except that the person most prominently featured in the photo (with his legible name badge) was not involved according to person who was fired. I haven't seen Adria, either on twitter or her blog, clarify which attendees in the photo were the ones making inappropriate comments.
I would say Alex Reid may have been libeled by Adria.
I think it's worth noting that Alex's name badge was clearly displayed and he was prominently framed in the photo. I believe the image and caption published by Ms. Richards implies his involvement. Possibly others in the photo as well.