Few Questions
1 - If someone grants trust to TradeFortress(or anybody) just to get that 1 bitcoin. Then can he/she remove(ungrant) the trust after getting the coin?
2 - Can TradeFortress use that "Trust". I mean the 100 RippleBTCs, Are they reflected in the main balance?
3 - How the heck TradeFortress got 1 Trillion Ripple BTCs even if they are fake?
1 - Yes, once you get the TradeFortress BTC you can remove the trust line to him, and you will still hold 1 TradeFortressBTC. If you ever send bitcoins to somebody who trusts TradeFortress, the client will use the TradeFortressBTC before using BTC from issuers you still trust.
2 - If you grant him 'trust', then he can use it. It will not change the balance, but he will be able to ripple through you. If you are holding 100 Bitstamp BTC, then he can send 100 BTC to BitStamp and withdraw real BTC, your balance will still be 0, but if you look at the trust lines you will see 0 for BitStamp and 100 for TradeFortress. Now you hold 100 IOUBTC from TradeFortress, who does not sound like he wants to redeem them, and he gets 100 real BTC.
3 - You can do this yourself rather easily: open two accounts (get a few hundred XRP in each), have account A trust account B, then have account B send 1 trillion BTC to account A. Open account A, voila - you have a balance of 1 trillion btc! But unless somebody trusts your account B as well, there is nothing you can do with those BTC, they are just imaginary.
I have a question as well:
Why is this in the Newbies forum?