"We had such a great time last week! I miss you so much <3"
Soon, everyone you know will see it in their feed. And, unlike a status, no one will call you on it for fear of you playing the None Of Your Business card.
This is usually done to advertise traits which when put in the direct form of a status update would make the poster's motives far too transparent.
MARK: She probably wants everyone to think she's the type of girl who is tight with her friends, and people would call her on it if it were a status update.
KATE: A proxy wallpost? Seriously?