As far as I've been able to tell, Alfred C. Hobbs is the original security bug bounty hunter. I highly recommend this article to hear and understand his story, his methods, his manner, and his motivation - There's a lot we can learn from Mr Hobbs today.

The American Who Shocked Victorian England by Picking the World’s Strongest Lock
On July 22, 1851, on a day when a visitor to London had any number of amusements at his disposal—from M. Gompertz’s Giant Panorama (“including a new...