Or so and so said you were on there.
I find it a bit weird how some people don't ever reply, comment or post on there but basically spy on others.
It's somewhat a family issue, although there is one friend who tends to message me just saying hi or how are you on anywhere but a social network. I don't even know how to reply to messages like that, they're so boring! Then they say they haven't been up to anything when turns out they have and I've been ill and not been up to anything.