"If there are no business opportunities which interest you on the forum, then why do you need a high trust rating?"
I'm active in a number of locations on the net, including my own websites. Bitcoin has become the currency of the Internet, and I hope that I can persuade more buyers of domain names to use it for payment. Bitcoin Talk is a great reference for potential users, and thus a good credit rating here could be important. Obviously stating that I am DT1, when due to a lottery, this is no longer true, diminishes my credibility. Potential buyers will obviously wonder what I have done to lose my ranking. Perhaps it is time to use a more accurate name for the system. The alternative is to remove oneself from the rankings, but this seems to be counter productive for every one concerned.