Forum mode change

As I'm sure you've noticed, the main forum is getting spammed quite hard lately. I'm doing my best to wipe these topics whenever they pop up (everything from pharmacuticals to role playing games to whatever) and I notice other mods are wiping these as well, but it's becoming a bit of a nuissance. Would anyone oppose the idea of switching this forum to "registered only" mode? Anyone could read the boards still, it would only affect posting. It would also cut down on the confusion of having dozens of "Guest" posters replying to the same topic. Good times.

Anyway, give your feedback. I don't know if this forum was suddenly added to some SPAM list but each time I load the forum now I'm seeing new posts that are advertising things which have nothing to do with triphop or music in general.