In-Game Parser.

[Kyuuen]

That is a fair point, perhaps it could be something that is "locked" in as you enter the dungeon or whatever, ie if you had it set to public/private when you go in, that's what it stays. Then no-one could demand that you suddenly change your settings to be public once you're inside. As seems to be general concensus though, parser isn't generally REQUIRED in anything outside of coil, except for learning/improvement purposes (or in my case general nosiness, if a fellow BLM is putting out materially more DPS than me, I'd want to know how he was doing it! )

As someone who's been staunchly against the addition of an in-game parser, the quickest fix to your suggestion would be simply to not allow the use of parsers within any type of DF. If one wants to improve their performance through the use of a parser then the last place you'd expect reliable data would be DF. As you already said it, allow it in custom made parties and PF where like minded individuals can group and help each other out. Expecting the sort of min/max perfomance out of DF is nearly unrealistic for a number of reasons besides just player skill/knowledge.