The flag button should be added to the regular thread view for comments as well. For the kind of trolling tptacek is talking about, downmodding really isn’t sufficient.
I notice the comment flag button once every couple months, and it always surprises me, so I'm going to call it a UX failure --- even though I think the idea is to make sure comments only get flagged when someone cares a lot about the comment.
There should just be a high karma+average requirement to flag comments.
