The "report post" button, for any post, is underneath the username and left of the "edit-quote-multiquote-quick reply" - there is a triangular symbol with an exclamation mark in it ... that's the one. Press that button and answer the questions that follow (why you are reporting the post, etc).
Here's something to chuckle about. Moderators/administrators have a couple more buttons there, to hand out infractions and trace the origin and history of posts. Take one guess who has more infractions on this board than anyone else: I do. We were having issues with the infraction system a while back and I opted to be the whipping boy, the test subject. I must have a hundred infractions because of that, from while we were trying to get it to work!
As for "da rules" ...
Down three-quarters of the way near the bottom is the "You may not ..." list, one of which is:
"Use the Web Site to post or transmit any unlawful, threatening, abusive, libelous, defamatory, obscene, vulgar, pornographic, profane or indecent information of any kind, including without limitation any transmissions constituting or encouraging conduct that would constitute a criminal offense, give rise to civil liability or otherwise violate any local, state, provincial, national or international law."
And right at the bottom is this, which authorises us, the moderators and administrators, to do what we have to do:
We may cancel or terminate your right to use the Web Site or any part of the Web Site at any time without notice. In the event of cancellation or termination, you are no longer authorized to access the part of the Web Site affected by such cancellation or termination. The restrictions imposed on you with respect to material downloaded from the Web Site, and the disclaimers and limitations of liabilities set forth in these Terms and Conditions of Service, shall survive."
Try not to make us use that :-)