Ever wonder who that person talking to u is? forgot what name = what personality?
did somebody change their name?
is this person a real life friend?
is this someone you like to trade with because their cheap?
is this person too young for foul language?
i suggest we have the ability to have a private note, can be quite small or large so that we can notate ourselves who this person is to us. i know other online games have similar features.