"No one is forcing them to sign the contract so "living in a free country" has nothing to do with it."
If they sign a contract that limits their activities outside of their employment that the rest of the country legally enjoys the ability to do then they are hardly free.
But then again I'm a libertarian so it doesn't matter to me if a female cop bares her
for the camera even though some police regulations forbid that type of activity....who was that Norma chick that got fired from the force for doing a nude shoot?