Lonewolf, I agree; when I said "prone to reckless or stupid decisions," that's precisely what I was thinking. While some people are able to draw a line between their personal and professional lives, it's easy to make the sensible assumption that breaking the rules in one arena might show a risk-taking personality who'd break the rules in the other.
There's plenty of precedent for that. It was just the people saying they could control their drinking, but assuming he couldn't control his drug use that surprised me.