"Don't do that, I'll tell the police", "I called the doctor to give you the needle" and "If you scream, the thief will come and take you", these three expressions that adults usually use, when they want to "finish work quickly" with children are comfortable, they are another evil of the way we educate them, the children.
Adults, from parents, grandparents, teachers to passers-by on the street, don't even "kill" the mind to listen to themselves, what they "take out" from their mouths and what effect these words have on the child when he hears them.
It doesn't even occur to adults that they have equalized and counted three "things" that are not equalized and counted. Equating the doctor with the thief and the policeman with the thief is to undermine the good, respect and responsibility of the child.
This bad education with messed up models can "produce" nothing but confused adults who don't know right from wrong and responsibility from irresponsibility.