Actually, because losing $1100+ is probably not what you want to see happen, I've transferred your 10.15 Bitstamp BTCs.
Give me an address to send your 10.15 back, because right now if you check your Ripple wallet you shouldn't have any bitstamp IOUs

This is exactly what I wanted to see happen, and exactly what was supposed to happen.
I trusted you for 100 BTC. You have withdrawn 10.15 BTC to blockchain. You owe me 10.15 BTC. We have successfully demonstrated how ripple works.
You of course owe me 10.15 BTC, and you can pay me that back through ripple at any point, I'd prefer it in ripple, rather than blockchain.
Ripple just models real life, only trust people or entities you view as trustworthy. I decided to trust you, and I'm sure you'll want to keep your trust and reputation over the coming weeks and months.
Still unsure what your point is?
My point is that if someone else had done this, you would be at a loss of 10.15 BTC, and I have no obligation to redeem my 10.15 BTC because I had no intention of honoring it in the first place, and there are no terms for redemption.