Here's a quick and easy, distilled version of the most important Forum policies. Scroll down for the more detailed version below.
Stay on topic -- model train talk only, please (though civil off-topic discussion is tolerated in the Diner thread).
Stay away from divisive topics, like graffiti, hoboes, train-hopping, and what makes a "real model railroader."
Avoid controversial off-topic subjects like race, religion, ethnicity, sex, violence, guns, abortion, politics, unions, and immigration, even in signatures. This extends to images, as well.
Be civil. No name-calling, insults, or put-downs (including accusing others of "trolling").
Keep it clean. No "bad words," even if you replace them with $¥Mߨ1$. And no racy pictures or discussion of adult topics.

No selling or advertising. That means no links or references of any kind to items or services for sale or auction. No promoting events, fund-raisers, contests, websites, Facebook groups, or other Forums, either.
If you spot a violation of these policies, have a problem with another Forum user, or want to contact the site moderators for any other reason, use the "Report Abuse" icon at the lower-left of every post.
See? That didn't take too long! 