After this comment and a similar one in the latest email from SS, I'll ask the stupid question:

Why do we have to remove our IDs for this little shindig?

Also, is there any issue with jumpseating on a company aircraft to attend? I'm on my way to a trip via MEM that day, so I can't see why it would be an issue for me. This ID question got me wondering if someone would have an issue with a pilot using the company JS specifically to attend this event.