I'm curious. Exactly what is the fear in asking her to clarify this public comment? She put it out there and obviously knew he would see it, yet he needs to pretend it's not there? Seems like a game to me.
FY: He's not pretending it's not there... instead he's not encouraging this indirect style of communication... By responding, he's ensuring that it will happen again... that she can post cryptic notes for the world to see, and he'll try to decipher them, then ask for clarification. NOT a healthy way to communicate, especially when the topic is so heavy... If she wants him to know whatever it is she's posting on a social networking site, she should just put on her BGP and tell him directly...