I believe that KRs and QRs ** in the past never felt the need to explain how to be a decent person. Miscreants were dealt with by their peer group as often as not, from what I read and hear.
** I have a near complete set of ARMY Sovereign's Regs from about 1840 to date, because I have become an historian of sorts. Sorry about that, and I am sure RAF Regs are better!