What if I use bitcoins to buy something and then the vendor doesn't ship it to me?
I fully expect this is part of the user experience Stripe will sell. If I buy something through Stripe using bitcoins and get stiffed, is Stripe going to tell me "too bad" when I complain to them?
Stripe isn't the vendor, they're the payment processor for the vendor; that decision isn't up to Stripe, it's up to the vendor. Your relationship isn't with Stripe, it's with the vendor. Your recourse is with the vendor as well, not Stripe.
The solution to this is block chain escrow through a third party.
I fully expect this is part of the user experience Stripe will sell. If I buy something through Stripe using bitcoins and get stiffed, is Stripe going to tell me "too bad" when I complain to them?
No, they won't, because Stripe isn't suicidal.