[pitt1980]

people have a long history of taking offense when you don't address them as they prefer to be addressed

from Mohammed Ali and Kareem Abdul Jabbar, not wanting to be referred to by their given names

to all sorts of doctors and professors wanting to be address by their professional titles

to all sorts of adults not wanting people under a certain age referring to them by their first name

you to intend to offend, by all means, offend away

but don't act under the pretense that referring to someone other than how they prefer to be referred to won't cause offense