Many commentators explain why Itzhak was wrong in his decision to bless Eisav. Then, when Rivka heard it, she asked Yaakov to stage a hoax and "steal" the Brochos. This is completely understandable.
Everybody agrees (see why-doesnt-yaakov-object-to-his-mothers-plan) that the proper way of dealing with a cheater is to cheat, but why to cheat his own father? It seems very plausible that Yaakov could deal with Itzhak reasonably and talk him out of blessing Eisov. Such a way would have numerous benefits - everybody would be happy, he wouldn't have to disrespect his father, he wouldn't need to run away from his brother and hide for two decades putting his parents in misery.
So why didn't Yaakov choose to explain the truth to his father and let his father deal with Eisov's lies instead of staging a hoax that everybody suffered from for decades?