I took a break from most social media for a few days. Since I came back, it looks like a lot of trolls from reddit have descended upon the site, and there's been a steep drop in the quality of submissions.
I know this has been mentioned before, and I wasn't sure about it before, but I now think it should now be a priority that the post author be able to moderate comments.
EDIT: I suggested that "In addition, users that the OP has ignored should not be able to post to the OP's threads.", but I missed this announcement: http://hubski.com/pub?id=57798