Been thinking a lot along similar lines here lately... somehow boils down to the good old: "whoever is free of guilt... "

One "lie" I always found funny when I lived in the US.. when I meet someone and they say "how are you". As a German I'd start telling how I actually really felt, until I was told, that the proper answer was something like: "I'm fine, thank you"... even when it wasn't necessarily true ;-)