UPDATE: he was on my morning train (possibly a coincidence? But oh God my blood ran cold when I saw him in my car). He stood in front of me for a second while I was sitting down, and I got a pic of him. I don't think he saw me take it.
(Now is the part where I really wish I could post a pic of Justice Scalia all "oh haha it was just an elaborate joke!" But unfortunately it's real. Ugh)
I've sent the pic to my husband so he knows what he looks like, and may post it to hollaback. Thanks so much to everyone for your empathy, advice, and humor - I really, really appreciate it.