pauloaguia: Ah, thank you, that's interesting. I can't try it as I've got no unread posts anywhere. ;o)

But it means that there's a natural limit to the exploitation. One thing that could be done is to level the playing field on the boards points by setting everyone to all-read on every board. No more (4901 new) on any board. It's not as if people will be missing out on boards that they've never read anyway. (For legitimate board readers, those with, say, 10 or fewer new posts on a board, those particular boards wouldn't be flagged as all-read.)