There is a need for some rules.
The fine-line will be complicated.
What are the perimeters of the subject matter, allowed?
A JESUS MYTHER thread is, in its extremely limited form, only about whether Jesus existed as a man, or not.
But, it must be admitted that is is within the realm of the broader Historical Jesus debate. The discussion will, at times, need to broaden out a bit, and then it is understandable if the discussion necessarily covers certain details about Jesus' disputed life. I suppose so.
I don't know if these issues are particularly relevant to a JESUS MYTHER debate, but it might be instructional for me offer some issues that often (or at times) debated in a historical Jesus investigation:
Did Jesus ever consider himself a messiah or not?
Was Jesus apocalyptic?
Was Joseph his biological father or was Pantera ( or another)?
Did Jesus have views closer to the Essenes or Parisees? (Questions about other sects come up, also)
How often did Jesus leave the Galilee region.
What was Jesus' ancestral line?
ISSUES RARELY PART OF THE HISTORIAN'S DISCUSSION:
The later Christian religion
Miraculous stories
Supernatural feats
CONCLUSION:
The latter three aren't looked at by a historical examination, so far as I know . The discussion of miracles, the supernatural, etc. should be banned from the Jesus Myth thread.