I don't know, I can see way too many times this function would be misused. I think it'd just be easier to face your friends about how you feel, and if they react negatively, then it's not friends worth keeping.

On a sort of semi-related topic though, I'd like a tool to "cover" the name over my head (in other players' screens) with an anonymous title, such as "Shady-looking Thaumaturge" or "Green adventurer." etc. The actual name could obviously still be seen through "Examine" subcommand though. Just an RP-friendly feature I've thought of. I kind of envy those generic descriptive names some NPCs have.