Nope - you can just check it periodically and delete what accumulates. :)

I've also got a public folder that I'm doing that you can move spam into, if it makes it to your inbox (not what makes it to your spambox). You should be able to see it now - it'll be Public/Mark As Spam". Add that to your folders as well and you should be able to move stuff into it at your leisure, and the system will mark it as spam once an hour. I just hadn't gotten up to sending out that notice yet.