Category Grouping in the UFO Community

This writing is based on the author experience in various UFO
communities in Indonesia. The problem is the UFO topic is a very
broad topic and can involve various fields including Science,
Technology, History, Myth, Religion and so on. This makes the
UFO community very heterogeneous with various kinds of personal
opinions in it. These various opinions can turn a discussion
into an unhealthy debate, and this has indeed happened several
times.
The author tries to make several categories that might divide
or classify a UFO community. This division or grouping is based
on the author's observations and the level of strangeness of a
thought in the UFO community.