Safety(TM) is indeed of the utmost importance. Just because the occasional skull gets broken while being Protected And Served doesn't mean it's wrong. After all, without our Overlords' strongmen, who would keep us Safe(TM)?
They tend to keep to their own, however I do know some. I was even partners with one years ago, broke him into the trade. I have worked on high rise jobs and large multi-dwelling apt/condo buildings with crews up to 150 people which were 95 % from south of the border. I think I have a pretty fair grasp on where they're coming from.