Ok cool. Correct me if I'm wrong, you want player advice on how you, as a player, can avoid the temptation of Forbidden Knowledge. Yes I'm being a bit cheeky, hopefully it lightens the mood.
Well, again, assuming you want to avoid being a jerk and aren't acquiring Forbidden Knowledge for malicious ends, the two main camps I can see here are "It is fundamentally impossible to avoid having Forbidden Knowledge affect your decision making, so don't sweat it and just play your character as you will" vs "As long as you don't act on the Forbidden Knowledge, and play your character as true as you can, it's no sweat."