Good idea, NonnaAnnie It is not necessary ro read every post, or every word of every post.
"DH" is often used satirically, about something annoying that Dear or Damned husband has done (you can take your pick which)
From a purely visual point of view, I think two initials (DH, DS and so on), are better than one, which can look like just a twitchy finger on the keys. Once you have worked out that any D could be superfluous, you can ignore it, it doesn't affect understanding the relationships.
However, I suspect there are people who can't ignore less relevant words while they grasp the rest of the sentence, so they get hung up at one bit (any sentence, not just ones with acronyms in), which would explain how much confusion there is sometimes about just what a post means.