Seems most of us will fudge as a DM and frown upon players doing it.I answered that I will fudge as DM if I think the game needed it. I didn't answer anything as a player because the options didn't seem to fit. I won't personally fudge (without an agreed upon fudging mechanism, anyway), but I don't expect the DM to follow the same rules on that. I see that as part of the DM's powers as editor of things behind the screen.

Seems most of us will fudge as a DM and frown upon players doing it.
As you've stated, you wouldn't fudge as a player unless agreed upon mechanics, but isn't fudging at its core a mechanic that someone uses (especially as a player) that changes the outcome of the game? A player doing it most of us say is cheating, a DM doing it is something that most of us think is to right a wrong/mistake in our games.
So I guess my questions to you is: How do you agree on a fudging mechanism as a player without it being cheating? I'm just curious how this would work in your game or a different game.
Nice to know about those mechanics, I don't have experience with Fate, and I completely forgot about the Whimsy Cards. Those rules are baked in.Several games have "player fudging" rules baked in.
At the basic level, Fate points from Top Secret (oops I died... no I didn't; this happens instead), poker chips in Deadlands, Whimsy Cards, and other such mechanisms give the player direct control over the character's fate after the dice roll. Other abilitieis like the Luck Domain clerical ability are similar but have a character facet to them.
Fudge or no fudge a DM should always roll behind the screen.
And the players better trust him.
Too much info on a DM's die when in public view. NOT good.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.