  We study the interstellar Na I $\lambda \lambda 5890, 5895$ (Na D)
absorption-line doublet in a nearly-complete sample of $\sim$9900 nearby
Seyfert 2 galaxies, in order to quantify the significance of optical AGN
activity in driving kpc-scale outflows that can quench star formation.
Comparison to a carefully matched sample of $\sim$44,000 control objects
indicates that the Seyfert and control population have similar Na D detection
rates ($\sim 5-6%$). Only 53 Seyferts (or 0.5% of the population) are found to
potentially display galactic-scale winds, compared to 0.8% of the control
galaxies. While nearly a third of the Na D outflows observed in our Seyfert 2
galaxies occur around the brightest AGN, both radio and infrared data indicate
that star formation could play the dominant role in driving cold-gas outflows
in an even higher fraction of the Na D-outflowing Seyfert 2s. Our results
indicate that galactic-scale outflows at low redshift are no more frequent in
Seyferts than they are in their non-active counterparts, that optical AGN are
not significant contributors to the quenching of star formation in the nearby
Universe, and that star-formation may actually be the principal driver of
outflows even in systems that do host an AGN.
