Titles are a crazy thing, to deliberately mislead or to not correct someone is that grey area.
Example: People tend to call me Sir, especially now that I'm older.
Knowing where its derived from I know its not really appropriate, although I don't usually bother to correct them. If someone called me Dr doctor that would be reason for correction.
Although if anyone called me the Chinese classical title of "regent" I wouldn't say no to that either
0.5 gram microsd delivered by 12,000 pound combustion vehicle and driver.