Whenever I have plans with a particular friend I feel really irritated when on the day of the plan she'll message to say she's "looking forward to the plan and will see me at x o'clock"
It's the feeling of being shepherded that irritates me. We made the plan yesterday, if it changed, or if I was ill, I'd have messaged her. I'm reliable and have never flaked out or forgotten a plan.
Admittedly this is mild irritation! I think it's the predictability of the message that irks me too, like I can picture her thinking "ooh I'd better message Gaunt now about today".
I always just ignore the message!