"Prophets are not without honor except in their own country and in their own house."
When Jesus walked this earth 2000 years ago, a section of people did not give him credit for the wondrous deeds he performed. That prompted him to say that a prophet like him was not recognized in his hometown. His detractors stopped at not giving him credit.
We go further. Not only do we not give credit where it is due, but also steal credit from those who should have it. Seeing us blatantly flout decency, our children act likewise. They take credit for acts not performed by them - like taking credit for homework and projects completed by parents or older siblings, taking credit for answers provided by others to difficult questions, winning games by cheating. Unless we check this habit as it starts, they can become crafty manipulators. But before we attempt to change them, we need to change ourselves.