A quick question:

Can Royal Oppression negate Fusion Summons and Ritual Summons?

Thanks!

Edit: Also, one more question -- since Dragged Down into the Grave cannot be activated if either of the players has no hand, I assume the same is true for Card Destruction. But the official site doesn't have a ruling on Card Destruction. Clarification?

You can use Royal Oppression on fusion monsters. Polymerization says right in the card text "and Special Summon the Fusion Monster from your Fusion Deck"

Ritual monsters are special summoned too.

You can still activate Card Destruction, but if you or your opponent have no cards then you or that person will draw no cards.

Ritual Summoning gets no such privileges. There are only 3 types of summoning: Normal, Flip, and Special. Fusion Summons and Ritual Summons fall under Special Summoning, since their summonings are from the effects of Magic cards. Any rulebook (or the website) should tell you this.

Go ahead and use the Royal Oppression to negate your opponent's Demise and Doom Dozer. My Oppression Gadget deck just got better.

If you read what I said... I didn't say if "both" players have no cards in their hands you can activate it. I said that if you or your opponent have no cards in hand then you can still activate it.

Besides the question I got from the post was more or less this

Can Card Destruction be activated if one person has no cards in hand. Which I answered "Yes you can..."

You can activate Card D as long as at least one of the players will discard and draw. If neither player has any cards in hand then it cannot just be sent to graveyard because you want to.

Royal Oppression can negate Fusion summons and Ritual summons IF it is active and face up before the activation of the card that allows the special summon. So you have to have it face up before they activate Advanced Ritual Art or Polymerization or use a monsters effect to special summon. You cannot chain Royal Oppression to Advanced Ritual art and still negate since it negates the activation and said card would have already been activated. It's a card that basically you just flip in their standby phase since there's very few ways to special summon and negate if it's face down. Only thing I can think of is Dark World wince they start their own new chains.