TexasCHLforum.com

Think about this, they will publicly state they have a 'no firearms' policy, but don't post to prevent patrons from carrying. This gives them an out from a legal standpoint if anyone ever wants to sue them for allowing people to carry firearms, or in the case of the concealed carrier getting sued by the family of the perp, keeps them from being accused of supporting the good guys actions with a gun.

I saw this tactic used numerous times over my 37 years in the corporate world; it's called 'plausible deniability' https://en.wikipedia.org/wiki/Plausible_deniability