This is the fourth post in my ongoing discussion of the rules. Feel free to sound off, just try to keep on topic.
4. Do not post pornography, other adult material, or links to said items. A good rule of thumb is if you would not show it to a thirteen year old, it is not OK to post.
The posting of pornography is not the purpose of this site. For a number of reasons--including the possibility of legal consequences, the presence of minors, the strong and diverse opinions and feelings about pornography and other adult content as well as our desire to not have our community marginalized or filtered by workplace internet software--we concluded that allowing adult content would do more harm than good.
There don't seem to be many people who have a hard time understanding this particular rule, still; if you are unsure about what does and doesn't constitute "adult content," go ahead and ask a mod. As with most infractions, the punishment will likely hinge on a variety of factors, but ultimately members can be banned for posting pornography on this site.