The NYTimes editorial makes a good point, of course:
The damage done to the political system this year by misleading, drive-by ads should be evidence enough. The requirement that candidates take responsibility for their ads is intended to reduce outright lies (though it hardly prevents them) and provide accountability. But all accountability is lost when secretive groups with fuzzy names like the American Future Fund lumber into a campaign, falsely accusing Democratic House candidates of supporting a mosque at ground zero.
These unrestrained outside groups became one of the crucial factors in the election.
And the chances of these factors changing with the beneficiaries of said factors in control of the house?
That much should be obvious...