Please note, these apply to the ENTIRE site.
Avoid duplicate topics. Use forum search and check for pre-existing threads on the same topic before creating a new one. If there is another thread that pertains to your topic, post your thoughts there instead of starting a new thread.
Keep it relevant. If you have nothing to say on a particular subject, you can skip the topic and move on. If you want to address a specific individual about personal matters, contact the user via private message instead of starting a public discussion.
No porn or gore. External links to sites containing such content or ads will be censored at the discretion of moderators, unless it is absolutely vital to meme research discussions and accompanied by a clear [NSFW] warning label. 
No flooding or spamming. Flooding, defined as repeated posting of redundant threads, and spamming, defined as posting of any advertisement or promotional materials, are strictly prohibited. If you see a thread by a spambot, do not post in it; doing so suggests that there is activity on the site and interest in the spam in particular.
No autoplay outside of your own profile page. Posting autoplay videos, mp3's, or SWF's outside of your own profile page is prohibited. This pertains to all comments, forum posts, and user pages. Violation of this rule may result in an extended period of ban.
Do not attempt to evade a ban. Using an alternate account, proxy IP address or other means of evading a ban are strictly prohibited. Violation of this rule may result in an extended period of ban.
Be friendly. We want our forums to be welcoming place for both old and new users. Please keep your comments and posts constructive and considerate in tone. If you observe a user breaking a rule, try advising the user in the right direction instead of posting insults or harsh criticisms. If the user persists, contact a forum moderator.
Props to everyone who helped update these including RocketPanda, Cyber6x, and RandomMan. To read the older version, KYM Forum – Know Your Meme Rules.