In the 70s one of my mom's friends invited her to join her family for lunch. She proceeded to go around the supermarket [Hill's, a NY/LI chain] making sandwiches for herself and her children while going up and down the aisles. They even ripped open cookie packages and drank from chocolate milk containers. She paid for none of and left a path of grocery carnage in her wake.

My mom left in horror. She was one friend lighter.