Yeah, I think it's his own harmless weird humor. Sort of a "hey,
   I know you're a real person and I know where you work"... which
   isn't funny to me, but it's an immature "oh look I'm smart and
   you thought you were private but you're not haha".

   It's the kind of thing I'd expect out of a devilish 11-12 year
   old but everybody matures at a different rate. My gut says he's
   harmless because he's doing it so publicly, as something he
   finds amusing, but I don't think it's stalker intent, otherwise
   he would do it privately.

   If he did it privately and people complained, that'd be
   different. But being public, it's like a drunk guy at a party
   who opens his mouth and says something that makes the virtual
   record needle scratch.