dashiell hammett
Last month I made this post. (Shorter version: alcohol consumption as a mechanism for social trust-building). I realized that Dashiell Hammett already covered this ground more succinctly 80 years ago in The Maltese Falcon:
Kasper Gutman: I distrust a man who says when. If he's got to be careful not to drink too much, it's because he's not to be trusted when he does.