Why? Respect should be earned not expected and age is no guarantee of manners as this Italian chap proved.

As for myself the only marginal DYKWIA incident I have seen was a chap with his wife and three kids berating the manager of the international lounge @ T1 because she wouldn't let everyone in (I guess they were in Y). In fact lounge access seems to generally bring out the worst in people who seem to get upset when they can't talk their way in. I saw someone having a go at the staff once because they wouldn't be let into GC @ T5 with their priority pass!