Im not sure they quite fit into this category, but cards which by their very nature hurt only one player very badly are worse to have around than Stonehorn Dignitary
5D's World Championship 2009: Stardust Accelerator, winning all single tournaments appears as an unlockable opponent: Endymion, the Master Magician, known as Divine Magician Deity Endymion in the Japanese version, is a character version of the card, "Endymion, the Master Magician"
Return 1 red Digimon card from your trash to the top of the deck
Snap it onto the bottom to save space
It got worse at a Target store in Brookfield, Wisconsin when a man pulled out a firearm in a parking lot following an argument about who was gonna get the next Zion rookie card (this is a joke, but probably not too far from the truth)
That said, they can bend with enough force and their opening can be a bit loose, so youll have to use tape to seal it off