I have to agree with Joe and Jerson. It is quite a hassle to enter a password every time. Maybe scale it by number of posts. IE the first 10 posts require authentication every other posts, then every 5 posts and by the time you get to 100 or so, just accept all posts unless someone flags the user. Also getting something that is human readable would be much better as everything seems case sensitive and a "P" and "p" look a lot alike when they are random text sizes at 45 degree angles.