Tony Vargas
Legend
Whether it's good for the game depends upon the game, so the role of player vs the role of DM seems relevant, and, in 5e, they're /very/ different roles. The DM's job includes making rulings and judgements about what's best for the game, the players' is primarily making decisions for his character. The former could easily/legitimately include 'fudging,' among many other things. The latter not so much.To my reading this discussion has been more on "do you think it is 'ethical' and 'good for the game' instead of 'do the rules support it'" so I asked my question with that in mind.
But, the degree to which it's 'ethical' seems pretty trivial, or, maybe I should say, seems to trivialize more important ethical concerns. Implying it's 'dishonest' for instance, is overblown. I'd also say it's inaccurate, that when you take something behind the screen, it's implicit that you're keeping the option open, so not deception, merely limited information-sharing that's consistent with 5e DM/Player responsibilities.