Seriously, describe to me how you'd steal a coffee with a doublespend and why it'd be worth it to even try. Spell out the economics and odds of success.
Same way they're doing it now. Best case it works and I get free coffee. Worst case it doesn't. If you had a 10%+ chance of getting free stuff wouldn't you take it?
What kind nd of free stuff? If I didn’t like it I wouldn’t take it. Now if it’s from Tiffany Chanel Dior I would take it in a heartbeat. Unless it was stolen or fake of course