By being inconsistent and unfair in discipline, and by showing favoritism. By making promises and never keeping them. Grownups never really listen to what children have to say. They always decide ahead of time what they're going to answer. Grownups make mistakes, but they won't admit them.
Grownups interrupt children all the time and think nothing of it.
If a child interrupts a grownup, he gets a scolding or something worse. Sometimes grownups punish children unfairly. It isn't right if you've done just some little thing wrong and grownups take away something that means an awful lot to you. Other times you can do something really bad and they say they're going to punish you, but they don't. You never know, and you ought to know.