Interesting - there is a common factor that runs through the responses on this thread - people for whom it is custom and practice to be addressed by their surname have no issue with it - which is understandable.
I would not presume to know, but it is possible that this thread has been instigated by exchanges on a number of threads between myself and a couple of AB'ers.
To reiterate my personal position for new readers - I have not been called by my surname since I left school at seventeen. I attended an all-boys' grammar school, where all boys were addressed by their surname, by masters and each other, unless, as jackdaw has said, personal friendships used Christian names.
Since leaving school, through college and the two places I have worked since then, I have been addressed by my Christian name, as is form and practice for both.
On a personal level, I am perfectly happy to be addressed as 'Andy' by anyone of any age, I don't hold out for the 'Mr' tag - it makes me feel distanced, and slightly uncomfortable - although I accept it is appropriate in professional exchanges.
What I do not accept is being called 'Hughes' simply as a personal provocation which is done by two AB'ers. I have expressed on four separate occasions to the same individual that I find his use of my surname to label me as insulting -because we both know he does it to offend me, and provoke me, because I have advised my dislike of the use of my name in this way.
The fact that he, and another, continue to address me as 'Hughes' is both rude and insulting, but also childish and immature, not the behaviour one would would exprect from two people who make much of their former professional experiences, indicating that they see themselves as mature individuals. In this instance, their maturity deserts them, and they become no better than playground bullies.
So - to answer the OP - //QUESTION: Do ABers consider it bad manners and offensive at any time in their life to be addressed by their surname only? //
Yes - I most certainly do.
Interestingly, at the age of sixty-one, this is the first time in forty-four years that anyone has called me 'Hughes' - and sadly, that is only done for the petty joy of immature men on this site.
Perhaps, in the light of this 'robust fiery debate', the two in question will start to act their respective ages - but I am not holding my breath.