[Speaking about Web sites where atheists denounce Christianity - what the original poster posited as 'casting pearls before swine']

I would agree with BibleNuggetLady, and say those sites are places the Lord would not want you to go. NO one there is open to having their minds changed. I would consider them the very definition of "swine" because they have made up their minds to roll around in the "mud of the world" rather than hold themselves up to any kind of Godly standard. They have as much potential in their souls as anyone else, but have CHOSEN not to use it.