You can click on "report to moderator" to e-mail the moderators a message you think needs attention for some reason.
Quite a lot of people use the option and it's really appreciated when there are too many posts to keep up with.
The kinds of things reported can be double posts, personal abuse, swearing etc.
Anything you think needs the moderators attention really.
The e-mail we receive contains a direct link to the exact post in question.