I tested this theory in the wild the other day at work. I was on a call with my department lead and a few other folks and I replied to an email the DL had sent me, thinking that, because he was on this call, he wouldn't notice when I sent it and would not catch me multitasking.
However, he replied to said email within five minutes, asking a question that required an answer. So I answered and was like "Also, I was going to apologize for answering emails during this call, but I see we're both here at the Devil's Sacrament, so I don't think an apology is necessary."
I watched him read that on screen and try not to laugh. And then at the end of the call as everyone started saying goodbye, he goes, "Hey, MJ, I meant to tell you. I like your shoelaces."
And I looked straight into my camera, stone cold serious, and said, "Thanks. I stole them from the president."
And the rest of the team was like, "What...the fuck...?" before he abruptly ended the call for everyone.
So now my DL and I know this about each other. He could be any one of us.