I'm almost 40 and I've had about 20 jobs since my first and I've walked out of every single one. I don't owe them anything. They wouldn't give me 2 weeks notice before firing me, right? I only walk out because it's fair and what should be expected of me.
It's cathartic to throw a middle finger and leave, but burning bridges needlessly is pointless. You're just guaranteeing if someone asks your boss about you that you're blackballed.