The Watchtower Society should get a clue.
Here in Texas, we have the FLDS ranch (recently it was raided as was shown on the news). They have the most effective means of controlling people.
Build a compound, put large fences around it, keep televisions and evil computers out, make the women dress in prairie looking long dresses, and of course, DENY THE CHILDREN EDUCATION.
Once that is done, you can convince them of anything. They will even give over their young girls to old men for their perverted pleasure and call it worshipping God.
Yes, the WT has a good start, but without the physical boundaries, you just don't have the utmost control. Of course, all that land surrounding Patterson, mmmmmmm........