What we don't know is why he did it. Period.
We don't know if he intentionally committed suicide in front of a large crowd, or if he had a spontaneous psychotic breakdown.
We don't know if he was on drugs, and if he was, we don't know if they contributed to this event, or whether he took said drugs intentionally. It's not like nobody's ever been dosed without consent, right?
Nobody knows, and anyone asserting they do is full of shit. All I see is utterly baseless speculation, depressingly frequently used to attack a dead man, sometimes even in venues where his family is reading what's written.
Because I know that at least one of his immediate family members will read this, I'm not going to quote anything attacking Mr. Mitchell. In summary though, I've seen many people in the community posting things accusing him of being a selfish jerk for doing this in view of others (including the rangers and firefighters who tried and failed to stop him) and traumatizing them, and/or accusing him of damaging their burn and future burns.
If you're traumatized by watching a man run into a raging fire, I think that's understandable. I'm glad I didn't witness it. However, lashing out at him is really not ok. You have no idea why he did it. You have no idea if he was of sound mind at the time. Unless you know otherwise (and you don't), the only appropriate response is empathy, for him and the terrible way in which he died, and most of all, for his family. And frankly, if he was of sound mind, I think I feel even worse for him. What kind of pain and suffering must he have endured to be willing to run into a fire and try to burn to death?
And imagine what it must feel like to have your husband or brother or son cross an ocean and a continent to get to an event that he, like nearly all birgins, was eagerly anticipating. You give him a hug and send him on his way, looking forward to the stories he'll have to tell.
And then you get a call that you never want to get. A voice on the line tells you that your husband, your brother, your son is dead. Not just that, but you see pictures of him just as he was running into the raging fire that would kill him spread all over the internet.
Then it only gets worse, when people on the internet start attacking your brother, your son, your husband. Talk about driving the knife home.
Think about that before you decide to throw empathy to the wind and convict the man based on nothing but speculation. Please. Let's be better.
I want to include these words from his sibling, Micah, who said this about Mr. Mitchell on a reddit thread I had posted:
"Joel was my brother. I don't want to share to much at the moment but I do want to let the world know how much he cared and loved every single person on this planet. He was the kind of man who would give you the shirt off his back, his meal before he had taken a bite, or the last dollar in his wallet (these are actually things I saw him do first hand). He was truly selfless, humble, compassionate, and cared about everyone. He only knew love and nothing else."
Now, for those whose petty complaint is that he 'ruined' the Temple burn the next night, or that the burns will be different going forward because there may be a fence or a wider perimeter or whatever, I have this for you:
I'm Dr. Yes. I run this site, lead a theme camp called Friendgasm, and make Burning Man videos. Just say yes, folks, and help keep Burning Man weird!