Third Rock From The Sun, a wonderful show from the 90's(?) where a spaceship with 4 aliens landed on earth and they "try" to fit in. In one episode, dike, the leader of the aliens learns about https://youtu.be/TVD5wvJ1ru4?t=1m54s. Basically, he sets the "tip pile" on the table and as the dinner progresses, he subtracts from the tip if the service is lacking. He will also add to it if the service goes above what is expected.
I do the same when I play an RPG. I have a "phantom number" in my head. Whenever I have to "head cannon" something, or make my imagination override what the game is telling me, I subtract from this number. I do take into account the limitations of computer programming and give games some leeway.
Now, I realize that roleplaying is not what most players seek these days, as they look for their next random target to kill, but I wonder how well RPGs would be received if more players played this way