I don't honestly think there are many people anymore that have a conscience. If they do, they know how to ignore it very well, or take drugs, alcohol, or whatever.
It's not like you have to be Einstein to know what you should not do under those circumstances. The guy that used to live next door to me was burning yard waste one day and he set the field behind my house on fire. The fire Department had to come. Everyone, including me was out there beating the flames with shovels. He should have known better. First it is illegal to burn things in our city. Second, it was very dry and the field was just stubble from wheat, I think. And then he left it unattended. I know he got a ticket. Never found out what the fine was. I was standing talking to him when the Fire Chief and a police officer approached and said..."Ok, who was the dummy that started this". I almost ran away. Every year on that day I send him a little reminder of that day. We are all capable of stupid things. No one alive has not done something totally idiotic. Killing yourself would be just as bad as the other. Standing up and trying to make amends is the best you can do for yourself and those affected by what you have done. In the case of a huge wildfire I have no idea what you might do to make up for it but something would be possible. It would probably never be enough to anyone but that is all you can and should do.
Mg