Do What They're Not Expecting

This morning I received a private message on Facebook from someone whose name I didn't recognize. It turned out to be abuse from someone who'd previously sent me a friend request, to which I'd responded by asking the reason.

I soon concluded he was a troll, and was initially inclined to retaliate in some way. But then I decided it would be more interesting to surprise him by finding the original request and confirming it. But it seems I'd deleted the notification, and searching Facebook for his name yields no results. He must have deleted his account as soon as he sent the message, so that I couldn't respond. Oh, well.