Nonsense. If someone such a place wants to know what liberals think all they have to do is turn on the MSM. CBS, CNN, any of the big ones. That and most of that comes out in movies and TV since most of the people that work in those areas are big city libs.
Of course they can turn on the liberal media, but many do not bother, any more than, say, Orthodox Jews would buy pork, despite its ubiquity.