It is possible, however, that rather than serving any practical purpose, secrecy itself is relevant in part as a matter of style. The mere suggestion of a threat creates a menacing atmosphere, which increases both the need for protection and the effectiveness of intimidation. If one does not know where and when the blow will fall, anxiety and distrust grow more intense and fear becomes generalized. A heightened—almost paranoid—sensitivity to signals transforms the raising of an eyebrow into the most compelling of threats.

Diego Gambetta, The Sicilian Mafia The Busi…, loc. 338