Salutations! Welcome to REDDEAD.NET, aka RDN. We're one of the original Red Dead Redemption fansites, created as a side project by yours truly (Andy) and Adam (aka "adamcs" from GTANet).
We're a relatively young forum, so bear with us as we'll continue to grow steadily over the years to come.

That said, we do have a few ground rules we ask everyone to abide by:
No posting of pornography or linking to pornography. This means explicit, NC-17 stuff. We don't have a way to verify the age of users here, so such content is restricted.
No trolling. Acting like a jackass for the sake of pissing people off? That's a paddlin'. This includes posts that are obviously offensive to a huge group of people (racism, sexism, religion, console fanboy flame wars, etc.) as well as targeting individual users.
No flaming. Arguments are fine. Gigantic rants of spiteful hate are not. If things are getting out of hand, we have the right to step in and settle the situation by whatever means we see necessary. This can range from closing a thread to issuing temporary bans as a "time out" for the offending users.
Spamming and general douchebaggery. This should be a given, but obviously some users are oblivious to it. So, for the record: Derailing topics, starting up arguments and then complaining to moderators when you get blasted, posting in the wrong section because "your thread will get more views", etc. counts as douchebaggery. NOTE: THIS RULE IS HIGHLY SUBJECTIVE SO
USE YOUR COMMON SENSE.
No warez or piracy. While we might not be the biggest fans of the MPAA, RIAA or any of their kin, we
do support the hard work of the men and women who develop the products we love. This means you can't request, link to, refer, or discuss (loose term there - use your common sense) illegally-obtained, copyrighted material.
No advertising 3rd party sites. Links from your signature or profile is fine, but starting a new thread or bombarding other users with PM's won't be tolerated. However, you
are free to promote events - such as multiplayer matches - around other areas of the forum.
No impersonation of other users, staff members or Rockstar employees. In other words, don't be an idiot.
No creation of spam threads. These are addressed on a case-by-case basis, but are fairly easy to spot: single-word posts, "forum games" (which basically involve you doing something silly, such as posting a single word or a number or something else meaningless), and so on will generally be cracked down on. It is ultimately left to our forum team to decide whether or not a particular thread is considered spam.
*NEW* Maximum signature height is 200px. There is no limit on width. This is a newly introduced policy to crack down oversized signatures.
How do you know if your signature is over 200px? If a scrollbar appears in your signature, it's too big.
Please refrain from posting any drug related content. No pictures either. We have no way of restricting who sees this information, and I think the rest is obvious.
Want to help? Use the REPORT button. It looks like this:

If a post, user, etc. is in violation of the rules, the fastest way to get our attention is to report the problem properly.
To quote the famous entry from GTAForums:
"Remember, you are a guest on a free service. Our moderators and admins reserve the right to remove you from these forums at any time for any reason. You have no rights and may make no demands."
Offenders will be dealt with on a case-by-case basis. These rules are subject to change at any time, so be sure to check back often.
In most cases, using common sense will be more than enough to keep you in the clear. It should also go without saying that certain useless activities (such as trolling, flaming, harassing users, verbally abusing staff, etc.) won't be tolerated.