Their behavior goes beyond the bounds of 'decency'. [=it is not decent or acceptable]
If you're going to be late, please 'have the decency to' call and let me know.
Sending aid to the victims was simply a matter of 'common decency'.
(..) You'll never take my child out of this house. She's my child, too, Scarlett. You're making a mistake, if you think I'm leaving her here... ...with a mother who hasn't the decency to consider her own reputation. You're a fine one to talk. You think I'll let that child out of this house... (..)1939 Gone with the Wind