First off, you should read The Rules for All Forums. http://www.roblox.com/Forum/ShowPost.aspx?PostID=80620879
No, seriously. Read the Rules for All Forums. They apply to Off Topic as well.
Moderators may periodically post temporary rules when an inappropriate topic or meme flares up. Listen to ROBLOX Staff and heed what they say. Warnings to stop a certain behavior, whether it’s in a forum post, PM, in-game or a ban message, are serious.