I think he proves a very big bug in the entire ripple system.
No he hasn't.
It's not fake BTC.
He conned a bunch of newbies into trusting him for 100 BTC with the promise of "1 free Ripple BTC". He gave a pretty picture so that the newbies without a clue could follow his misguided instructions.
Those users have placed a trust in TradeFortress that he is good for 100 BTC when of course he has absolutly no intention of doing so. His goal is to let others use Ripples liquidity features to take the gateway BTC of any newb that has any. One person had 1 BTC/Bitstamp taken out of his account in exchange for 1 BTC/TradeFortress (because that's what TradeFortress knowingly conned the nebie into telling Ripple it was okay to do).
User 2, receives the fake BTC and send the item who was selling (LTC, ripples, USD,etc) then he realizes that he cant trade his BTC anywhere, because its fake and get scammed.
The only way this can happen is if User 2 *also trusts* TradeFortress. If not there will either be no payment path or the path will go through someone that trusts TradeFortress.