Mark as Unread - default set by admin?

Is it possible to make the option Enable mark topics as unread in the user preferences/interface be set to checked by default, set by the admin?

EDIT: Found it. It’s actually called Default other enable defer (I’m confused about why not call it Mark Unread instead of Defer?)

I also just noticed that this doesn’t do what I expected it to do, so I’m not sure how useful this feature actually is?

  1. I was expecting it to be available on replies, not on the topic. Isn’t what the bookmark is already doing? If I like a topic, I bookmark it. Mark as Unread seems a bit redundant?
  2. If it’s applied to individual replies, then that would show in my notifications panel. If I click a reply notification, read it, and think I need to reply to it later today because I don’t have time now, then a Mark as Unread would be helpful. Maybe this could be limited to replies directed to me?