I completely agree with you.
And I have another suggestion to add here.
I am active on various Forums, writing and reading stories. So I have a lot of people on my list to whom I send PMs and people I receive PMs from.
Different people that is.
Is it possible to GROUP them Forum wise, ONLY for the purpose of the user for PMs. It wotn have chat or anything. But just a group. For PMs. So I know whom I send PMs to, whom I receive from. Usernames and DPs don't really kndicatw the Forum.