If you've seen a picture, or anything, in a thread that you think is "questionable", click the FLAG icon which will bring up a screen to type in a message. Then when when you hit "report post", all the site moderators will get a copy of it, and someone check out the thread.
Thank you for your response. I am glad that the moderators are always available for any problems that may arise and they have already assisted me. It is much appreciated.