> If no one agreed with them then theirs would be the only flag and there would be no effect. If several people agreed then there would be several flags, and that's what appears to happen.

It would be good if users were given not only flag, but also unflag possibility. As it is right now, it takes only a few users to flag an article to disappear, although there might be hundreds users that would be opposed to that that can affect the flagging process because there is no unflag option.