Your airlock ran backwards already when you cold crashed the fermenter as the air and liquid inside cooled down and contracted. It will do the same as you pull it out. Most of the airlocks (assuming they are not overfilled) won't allow the Star San or Vodka to come out if the air flow is gradual in either direction. I agree with fmader that a bit of Star San won't affect your beer - very neutral stuff.
As far as the airlock being stuck, I would put some StarSan on the grommet, let it sit, then twist it off if it seems to be stubborn.