Of all the great houses in Game of Thrones, House Stark is the one best known for adhering to a sense of honor. They are a strong, stalwart house who prize justice and fairness, and compared to families like the Martells, Tyrells, and Lannisters they're the least scheme-y nobles in Westeros.

On the one hand, that's great! House Stark are the good guys and every story needs those. On the other hand, that honor has been the cause of death of every dead Stark on the show.

In the second episode of the final season of Game of Thrones, Jon Snow went Peak Stark and told Daenerys the truth about his heritage — that he is the legitimate son of Daenerys' older brother Rhaegar and Lyanna Stark, and is the rightful heir of the iron throne.

Was it the honorable thing to do? Absolutely. Was it the smart thing to do? Absolutely not, and it's the exact same mistake Brandon the Elder, Rickard, Ned, Robb, Catelyn, and Rickon Stark made right before they died.

So uh...bye, Jon.

Choosing to tell an inconvenient truth or trusting in a code of honor is the worst thing a Stark can ever do. Before the events of the show, Ned Stark's brother Brandon confronted the Mad King about Rhaegar Targaryen's kidnapping of Lyanna Stark and was imprisoned. The Mad King then asked Brandon and Ned's father Rickard to come to the capitol. Rickard nobly demanded for a trial by combat to decide Brandon's fate, but the Mad King cheated by declaring fire, like actual fire, as his champion.

Rickard burned to death, and Brandon suffered a worse fate: he was tied around his neck with a sword just out of his reach and strangled himself trying to reach the blade that could cut him loose and save his father.

Dirty Tricks: 2, Starks: 0.

Ned Stark made two similar mistakes when he told Cersei Lannister he knew her children were bastards and when he trusted Joffrey to send him to the wall instead of beheading him. It was honorable for Ned to give Cersei a chance to run, but she took advantage of that to throw him in the black cells. It was plain dumb for Ned to trust Joffrey, but hey, Starks gonna Stark.

One more for team "screw honor."

Moving forward to Robb and Catelyn Stark. Robb actually did a dishonorable thing by marrying Talisa Maegyr instead of one of Walder Frey's daughters and overcompensated trying to gain some of his honor back. Catelyn trusted Walder Frey to stick to the laws of guest right, which should have made her family safe in his hall, and Robb followed her lead. The Red Wedding could have been avoided had the Starks not tried to appease Walder, and that's two more Starks down in the name of doing what was right.

Rickon Stark died because he couldn't run in a zigzag pattern, but he also shouldn't have trusted Ramsey Bolton to let him attempt a 100-yard dash across a battlefield so that one's kind of a wash.

Anyway, the worst thing a Stark can do on Game of Thrones is trust an enemy and tell the truth, and now Jon Snow's up and done both. In the finale of Season 7, he messed up the parley in the dragonpit by telling Cersei he'd already bent the knee to Daenerys, and now he's told Daenerys that he has a stronger claim to the one thing she wants on the eve of the most important battle of their lives.

Jon, sweetie, baby, honey child — stop. Even without the context of uncomfortable truths killing all of your relatives, being honorable is dumb as hell in this situation. The Night's Watch murdered him for less. There's still a lot of season to get through and it's unlikely that Jon will die in the upcoming Battle for Winterfell, but he may have already made a quintessentially Stark mistake. Only time will tell if it costs him his life.