Games like Battle Star Galactica define pretty clearly what kind of table talk is allowed during the game to help give the Cylon Traitor a chance to remain hidden.
What, if any table talk is allowed in Shadows Over Camelot? What kind of talk is specifically forbidden?
Can you for example peek at the Progression of Evil deck (with the appropriate knight), and then say "don't draw from the deck," or "the top card is everyone lose a life," or can you say nothing?
Similarly, with King Arthur, you pass cards face down. I assume you cannot reveal what each player passed the other after the fact (hands should remain hidden, right)?