Oh man. You are going to get a lot of traffic. Please do something to block a spammer's ip. Have a flag button and do a soft delete it after a certain number of flags. Soft delete because you can review to make sure its actually crap and not the top item in your page :) Good luck
I just felt the need for that a few minutes ago, a troll overwrote all of the articles with junk text, and I had no way to easily block his IP. I'll be working on that ASAP.
