I was an HR Manager for a large US retailer in a state that didn't pay-out earned sick time. I started my new job, 3,000 miles away from my old one, and called out everyday for 7 days until I quit on the 8th. “I'm not coming back, I moved to California. I needed my sick time to buy a new wardrobe, enjoy the snow.”
Fuck these companies that penalize you for not being sick & showing-up to work. Take it from the guy in the HR office. Never forfeit PTO.