Lurker37 said:1) Has anyone ever played with a group where the difference in opinion on gamerules as gameworld physics became an issue, and how was this handled?
I typically have this issue myself with published books and modules far, far more than games in actual play. For example, shadows being easily capable of bringing about an undead apocalypse bothers me in 3e, because by my "rules-as-physics" philosophy, their statblock provides that they can do that, so they can do that, and it leaves me holding the bag for answering why that hasn't happened / doesn't happen.
(And God forbid a Shape of Fire shows up to wreak havoc.)
For an even better example of this, there's a power in Exalted called Implicit Construction Methodology. It's not particularly destructive of balance or gameplay, because (in typical PCs' hands) it's much quicker but not notably more effective than comparable abilities for making magical equipment. However, it is destructive to the setting, because in the hands of a very high-powered character (of which a good many exist and existed in the setting), it far obsoletes any other sort of construction for almost everything, including giant factory-cathedrals, which are a major setting feature. As such, from a "rules-as-physics" point of view like mine, that power is bugged.
2) Who be able to enjoy a game where the DM held the opposite opinion, and what, if anything, would facilitate this? (e.g. announcement at the start of the game which philosophy was being followed)
I might be bothered by it because I see high-level D&D as almost superheroic fantasy, and I personally would not like a story wherein 16th-level player characters are just treated as tough professional soldiers who have to honestly worry about an angry peasant girl knifing them. I know I would be bothered by things that break the rules in explicitly stupid ways - I believe someone earlier on this thread (or perhaps on another recent thread) mentioned a fire-immune creature in a published module that's described as having received crippling burns from a lava bath.
Barring that, if we were still playing a game of heroic fantasy, it's probably all good.