That way you'll think twice before you finally break and tell a dastardly detective that you open your encryption key with 'MyDrug@ddictionsmake1tsoIneed_aduckthroat2fuckJust2feelagain. For one thing, its long but memorable, and it cuts down on careless revealing to people you think would 'never betray you'. Downside is phishers get an easy time as blackmailers.