If I could only share. However, this is pretty public. All you need to know is that we deal with someone this ridiculous in our household on a fairly regular basis. Except this person refuses to go to Walmart entirely.... like no matter what. What an idiot.
And this is why our 6 year old does not throw temper tantrums, shows respect ("yes/no sir/ma'am") and has manners ("yes/no thank you" or "yes/no please"). Demonstrate to them NOW so they can and will grow up to be a respectable adult. Tough love, baby. Works like a charm.