Ad d: an acquaintance of mine named his son after himself. We don't do suffixes here, so no "II." or "Junior" - they're both Mr. Foo Bar, at Baz Drive, Quuxtown

Ad d: an acquaintance of mine named his son after himself. We don't do suffixes here, so no "II." or "Junior" - they're both Mr. Foo Bar, at Baz Drive, Quuxtown. The age differs, of course, but rarely does anyone collect it, much less use it for disambiguation. As you say, it's a mixed bag - either you get to impersonate the other, or the police gets all confused when looking for a rowdy adolescent and finding a middle-aged man, or you just can't get booked ("we already have you here" "no you don't, that's my son" "that's impossible, there can't be two of you, computer says so!").