All of the bars would be closed, pornography banished, and pristine streets would be filled with tidy pedestrians who smiled at each other. There would be no swearing. The children would say, "Yes, sir" and "No, ma'am," and churches would be full every Sunday...where Christ is not preached.
Many of the Mormons I've met here are genuinely moral people who are trying to conform to the LDS' expectations. The fourth of July celebrations were today (the 5th) to allow for Sabbath-keeping on the 4th. Grandparents start "mission funds" so their grandchildren can travel for two years as evangelists after high school. Utah has the highest birth rate in the nation and the youngest average age of marriage. Cute little children are everywhere.
But the pressure to conform may be behind Utah's high suicide rate, and the mass of extra-biblical theology that drives their moral behavior covers up the gospel of grace.
For instance, marriage is required to be eligible for exaltation after death. Doing their best throughout their life on earth is believed to be required to reach higher attainments in the life to come.
From what I observe living among the LDS, they affirm what sounds like the Gospel of grace. But what they don't see is that it has been so covered over by man-centered duties (along with a fundamentally un-Christian view of God) that the true Gospel is in effect lost and, as Barnhouse suggests, they are a moral people without Christ.