Board Thread:Suggestions forum/@comment-28153737-20170107050834/@comment-27219153-20170107061643

Nether portals cannot be lit in Middle-earth. However, portal blocks can be placed in Middle-earth using /setblock. I would guess that this is how players got into the nether. I don't support this config option.

I'm fully on board with the friendly fire and alignment config options. As for the others, I can see a few specific situations in which they would be useful, but overall I think they would be less useful than the other two I mentioned.