This is very true. I know people who would probably support nationalization of all utilities, manadatory worker control of all factories, 90% tax rates for the rich, and government-enforced closure of all churches ...
but, they'd say, since most people support those common-sense ideas, they aren't really liberal ideas at all. Just moderate, that's all.
Fact is, all the traditional major news sources are aware of this and are increasingly responding to it. Look at how the L.A. Times reacted to complaints about its "sexual gropinator" stories, for example.