Thom,
Adding a subject line doesn't really aid the search function.
The search function will look in the titles and/or the body of the posts (depending on your selection) and considers the subject line as part of the post. If the keyword you are searching for is in the body, having it in the subject line won't matter.
The point I was trying to make is that if a new thread is started, it'll pop up when the user clicks 'New Posts' on the taskbar at the top of the screen with a title that's indicative of the subject.
I stopped reading the original 'RAF' thread because the subject kept changing, and it's 45 pages long!. It would pop up when I clicked 'New Posts', but I would skip it. There might be something in there that interests me, but I don't feel like wading through all the rest.
You don't always know what you are searching for.
Sometimes you just stumble on to it.
But it really doesn't matter to me. You guys can do it however you want.