Seasteading

Today I went to a lecture given by Patri Friedman (grandson of Milton Friedman...) on Seasteading.  He intends to build islands out in the middle of the ocean and create unique governments created by the people, for the people (haha, couldn't help it).  His issue with the world today is that there is no chance of a new government emerging anywhere without millions of people dying.  So, to begin a new government he is going to build platforms out in the middle of the ocean, as that is the only unclaimed earth left, and let the people who live there design their own rules to live by.  He envisions people being able to move from one island to the next until they find an island that most closely matches their own moral/ ethical belief system and choose to stay, (to avoid the issues of emigration and immigration that are present in our land owning governments, people having the right to come and go as they please is his only requirement for these emerging governents).  My most poignant concern - is this not going to enforce racism/ prejudices that are prevalent in already existing countries and governments, but not so blatantly separated from one another?  I can imagine a liberal island and a conservative island going through a few rough patches...  Or the Mac island vs. the PC island...