People who I only really know through various online services and who send me friend requests on Facebook should probably include a message with their nicknames, because I do tend to keep my friends list pared down to just my actual friends. So I end up saying stuff like:
“A friend request from [Real Name]? Who the hell is [Real Name]? Hey Sweetheart!? Do we know a [Real name]? No? .. Fuck. Let’s check their interests … Monty Python, Science Fiction … that’s probably someone I know somehow … what else is there … World of Warcraft .. 70 Mage on Proudmoore .. Oh! It’s Elfburger! Why didn’t he just say he was Elfburger in the first place?”