I probably ABU but I'm getting really irritated with the trend of posting blue skies / pools / beach all with captions along the lines of "isn't it awful / pity me / having a terrible time" to which other people have to reply "oh yes, so sorry it's so horrible / sending thoughts and prayers". It happens every time and is so predictable. It's always the same people too. Middle class, a bit smug, photogenic children, usually gym bunnies. The same people who say things like "solid zero" or "Very good. Would recommend / use again" in normal conversation.