They do not have to break the law for you
In some countries, even in the United States, it is illegal to sell cigarettes and alcohol to minors or after certain hours, and the saddest part is that people still ask and expect the cashiers to break the law for them. So, stop asking them to do this, because they are just doing their job.
“In New York, it used to be illegal to buy alcohol before noon on Sunday,” said Sarah Shaw, who worked at a grocery store during high school. “Our register literally wouldn’t let me ring it up. And oh man, people would go ballistic over that one, especially if it was 11:45.”