10 Worst Things Harry Potter Has Ever Done

10. Got Sirius Killed

To create a good hero, you have to sprinkle in a bit of a roguish element along with a strong moral code. You have to be willing to bend rules for the greater good, in other words. Unfortunately, when you're a petulant, volatile child with a history of making overly emotional mistakes, you can also fall into the trap of wrongly identifying what rules to ignore.

Take Harry ignoring Snape's Occlumency lessons despite Dumbledore's insistence, simply because he didn't like Snape. As well as spying on his most personal moments, Harry sabotages those invaluable lessons through apathy and gives Voldemort the key to trapping him in the Department Of Mysteries. He didn't cast the fatal spell on Black, but if he'd just paid attention properly, he'd still be alive.

And on top of that, he also failed to look after the mirror Sirius gave him - the most precious of gifts from the most precious of people - which would have allowed him to make sure he wasn't in danger. It's just idiotic.