Here's an idea, Joe - how about disposable threads. I mean, we've got the garbage dump threads, and someone has to take out the garbage every now and then. Unless there are things on those threads people want others to read months or years from now? I mean, the stuff is now virtually inscribed in stone for all the world to see. Anthropologists might study it someday. It might help MC run a teeny bit faster to have some "short shelf life" threads.