This is a list of staples. These are all, as of this moment, banned from the RP.
I apologize, but I heard far too many complaints about them, so they're not allowed any longer.
Sangan
Maxx "C"
Effect Veiler
Book of Moon
Dark Hole
Heavy Storm
Monster Reborn
Mystical Space Typhoon
Pot of Duality
Mirror Force
Solemn Warning
Solemn Judgment
Torrential Tribute
Fiendish Chain
Ally of Justice Catastor
Brionac, Dragon of the Ice Barrier
Leviair the Sea Dragon
Scrap Dragon
Wind-Up Zenmaines
D.D. Crow
Gorz the Emissary of Darkness
Thunder King Rai-Oh
Mind Control
Dimensional Prison
Royal Decree
Bottomless Trap Hole
Compulsory Evacuation Device
Mind Crush
Orient Dragon
T.G. Hyper Librarian
Cyber Jar
Magician of Faith
Witch of the Black Forest
Brain Control
Change of Heart
Graceful Charity
Harpie's Feather Duster
Giant Trunade
Pot of Greed
Raigeki
Snatch Steal
Imperial Order
Ring of Destruction
All of these cannot be used in the RP, no questions asked. Sorry, guys, you can blame your peers for coming to me about it. I have to change my deck as well, so it's not like I'm not a victim of this either.
Be sure to read the list and make sure you don't have any of the cards listed here in your deck. If you're caught, it will result in a suspension from the RP.