Banning cards

[rtotaleXVIII]

Is there any way to ban more then 5 cards from the game?

[Ingix]

For rated games, no (if you don't consider the 3 additional slots available for landscape cards).
There is an additional list for disliked cards, who will come up with reduced probability (50%).

If you don't care about rated games, you can design kingdoms as you wish, including the option to not have cards from certain expansion come up.