You know the ones - when it turns out you know nothing and almost did something that made them a social pariah.
Mine: DD14 is a fussy eater and complains that the school cafe food is gross. She loves chicken drumsticks though so I kindly bought extras so she could take some to school for lunch.
"Oh My God!!! I'm not eating THAT in the cafe. What is wrong with you!".
In retrospect I sort of get it. Tickled me as I had visions of her sitting there eating drumsticks Henry VIII style.
I no longer make suggestions. They're all wrong 
I'm sure I have many more. DH almost walked up to the school gate the other day as she hadn't appeared and wasn't answering her phone - she almost fainted at the thought.
Anyone else?