I agree. I've PM'd several folks over the years to let them know not to wait for a response
or get impatient and say something they'll likely regret. A Custom User Title entry would
seem a reasonable way to convey this somewhat sensitive information. People would
still miss it, but it might cut down on one form of unfortunate/misplaced noise.
Perhaps a date span might be appropriate (if known)? How to convey this with a sense
of honor and dignity is worth thinking about first...
Perhaps last used "Title" preceded by "Former" -and- a date span... or... ???
-grumpy