I thought the same thing. But then again, monasteries have a place within Christianity, and this community can serve a similar function. Additionally, and paradoxically, this seeming retreat from society could actually serve, by its way of life, as a beacon of light to our largely pagan society.
But if people want to enter the monastic life, they can. The Vatican wasn't built on an island in the South Pacific. It's smack dab in the middle of Western Civilization, and gave Western Civilization countless accomplishments in science and the arts and literature and architecture in addition to theology. It's in the world not of the world.
If anything, families need to strengthen the parishes where they live and become a become a beacon of light to people living across the street. Isolation tends to reduce one's relevance, not increase it. e.g., the Amish.
I understand what they are aiming for, but there's a fine line between following God's law with zeal and following God's law at the expense of neglecting your neighbor's salvation. The Pharisees were prime examples of people who isolated themselves and followed the law to the letter, but ignored their un-schooled flock. My head says, "yeah, awesome idea!" but my heart is saying, "no, these people are casting judgment on those who don't share our faith, and instead of helping them, are hiding from them."
Put it this way: The whole movement of "rapture" adherents is based in the notion that they are of a superior holiness to everyone else, and the because of that, they are separate and therefore worthy of being spared the suffering of chastisement. In fact, you and I are pretty much worthless (and condemnable!) to them unless we agree with their beliefs. They're an isolated group, albeit one with some firepower in the "Left Behind" saga. We, as Catholics, believe this is a ridiculous notion - that NO ONE gets a free pass - that my sins alone were enough to crucify Jesus. It seems a bit arrogant to assume that Ave Maria, Florida would automatically be holier than, say, Orlando. Last I checked, everyone sins. And if someone wants to buy condoms, they can order them on the Internet and continue to sin in spite of whatever rules such a community wants to institute.
So, this notion of building a Utopian-Catholic community is laudable in its goal of creating a community that has policies which oppose sin, but Jesus, Himself, said that He would leave the 99 obedient sheep to go and find the 1 one who strayed. This idea sounds a lot like taking the 99 sheep and leaving the one behind.
Every individual makes choices. Regardless of the temptations, it's within everyone's power to lead a holy life. And with (presumably) a Catholic parish in most communities, there is an eternal, supernatural source of strength and wisdom to guide people on the right path. We have a responsibility to bear fruit where God has placed us in this life. It would be irresponsible to pull up stakes and abandon the fight (and those we are called to evangelize) because Walgreens sells condoms.
Just my .02 (okay, maybe it was .03)