...in the British version of the show, this sort of thing already happened. And it was handled very differently.
There was an ITV political reporter (think Tim Russert-ish) who couldn't dance at all, but he was really funny. The voters kept saving him, but the judges (two of whom are the same as here) absolutely savaged him. They gave him 1's and 2's and acted like they were personally offended by the whole thing.
Finally, the reporter quit the show himself, saying he was afraid he might actually win and he didn't want to embarass the show that badly.
In the US, the same judges are terrified to say anything too negative to Palin. They give her 9's for no apparent reason. So I'm guessing they got the message from the Disney people not to offend the Palin demographic, right?
Not that it matters, of course. But it's one more reason why the British versions of all of these shows are so much more entertaining.