Here's the list of supplies the saboteur will have access to, courtesy of Endemol's infinite planning skills and Hamsterwatch's disbelieving tracking.duct tape
super glue
rope
padlock
food coloring
condiments
rubber bands
wire
glow in the dark ink
beeping electronic device
In other words, anything over the level of a grade-school prank will be discouraged. Or shot. Or maybe they'll just shoot the saboteur: it's not as if they don't have a spare. And where is all this stuff kept? Will someone notice a given hamster who keeps going back to an odd spot? How about tape residue on the hands? Rope burns? Ink stains? We're looking at Amateur Night In Cooperville, and everyone's going to wind up being booed off the stage.
Still, give the producers credit. They usually don't manage to screw up the twist before it actually starts.

Someone in desperate need of whatever the saboteur's paycheck turns out to be? But they only get that money if they reach an unknown point in the game without being caught. Getting spotted in the act while trying to accomplish anything using the materials above -- well, they aren't good odds...Oh, and as long as we're on the topic, what happens to the saboteur after they reach PayCheckPoint? Do they stay in the game? Exit gracefully? Because that hamster, by definition, can't win the game. Which means that if s/he stays in the cage, the chance exists of having hir go to F2. Would the player who accompanied the saboteur automatically get the top prize? If the saboteur wins, does the cheapest reality show on network television happily declare no prize and pocket the money? If you ID the saboteur early, wouldn't you want hir as your ideal F2 partner?
It only gets uglier from here.