This is an extremely rare occurence to say the least. While I've seen numerous fouled decks I can say I've never seen a player deliberately table a hand with two identical cards after aggressively betting with them. Just by sheer odds of occurence, usually you see a fouled deck in the form of two board cards, a board card and a player's hole card, or hole cards of two separate hands, and the players are gambling in good faith and aren't actually aware of the situation until the exposure occurs.
What's the remedy? I note the following in Robert's second paragraph on the matter: "A player who knows the deck is defective has an obligation to point this out. If such a player instead tries to win a pot by taking aggressive action (trying for a freeroll), the player may lose the right to a refund, and the chips may be required to stay in the pot for the next deal."
Note the word "may" used repeatedly here. Whenever that occurs it usually indicates that the author proposes it be up to the TD's discretion at the time, weighing all the facts at hand. Either that, or it's such a rare occurence that the author hasn't taken it far enough to finalize a definitive position. Having never actually faced this exact scenario, I'd have to say my reaction towards the player would be quite negative to say the least. Fortunately, in an all-in situation all hands should be exposed on showdown and this ruse exposed, but with less than an all-in, I find the idea that you can knowingly put a large chunk of someone's stack in jeopardy without jeopardizing your own inconsistent with the basic principle of gambling, not to mention the best interest of the game... Perhaps this is a fair subject for discussion at the next summit. Everyone I think agrees that in a "no fault" situation, all monies are to be refunded in the event of such a deck. But when there is deliberate malfeasance on a player's part (i.e. Roberts' "freeroll" attempt), under what conditions are they still entitled to part of the refund, when is their share forfeited and to who, when is there a replay of the hand, if ever, and what range of penalties might they be facing?