I have to agree with Aaron that more open threads would go a long way in fixing the inactivity problem at Hogwarts. With both Saoirse and Mathias, I have browsed through the forums, looking for an open thread to make a random appearance in and kind of throw a wrench into the works. Problem was...there were no recent open threads, so I made one, which has yet to be posted in, lol.
I don't think closed threads should be banned, but just maybe impress on members more that this is a school, and they will not always have complete and utter privacy. If your two lovey dovey characters are together in a common room, for example, is it really likely that they will be left completely alone to kiss and fondle and do whatever those hormone-driven teens will do. I, for one, would have teased a friend mercilessly had I caught them in the act of 'snogging' in public.
Another reason for inactivity comes to mind as I type this...the fact that so many people seem only to be interested in romance between themselves and one other character. I've tried to squeeze Saoirse into a few roleplays, but unfortunately, no one is interested in an 11-year-old girl who is too young to be romantically involved. I have to roll my eyes sometimes at the abundance of these romantic, sweep you off your feet threads. Hogwarts has turned more into a love shack than a school in my humble opinion. We need some more conflict....and mass threads.