Through the centuries the work place safety was improving gradually. You would be shocked how dangerous it was to be a factory worker in the early days of the industrial revolution. Or how many horrible ways you may die if you would serve on a ship of the East India Company.
Last century with all of its countless strikes, riots, and revolutions has brought us not only a 40-hours work week and a social security, but also a long list of the workplace safety rules.
Not all people are using those achievements of our civilization, though. This Paradoxoff Planet post is full of the truly Not Safe For Work pictures.