Thanks for sharing your suggestion on the forums! I'm a car guy myself but I stand by the current GoldVIP system in place for the following reasons:
Exclusivity - This allows those that donate towards the server to enjoy the perks
Less abuse - Let's say we make this a rule to use drift mode at 95% trustscore or higher. It would be very hard to enforce unless staff is there to spectate. Even with player reports, staff will usually act on EVIDENCE and not mere accusations that are "he said, she said" to provide a fair judgement.
Quality over quantity - Although we love to see the server populated, what a lot of the community looks for are players who are dedicated and have great quality RP. Although you may have good intentions, it only takes one rotten apple to ruin the whole bunch. In order to minimize this, I believe the system we have in place for drift mode is adequate. However, I think creative changes could be made in the future to enhance RP.
Again thanks for sharing man and this is just my personal opinion on the issue. I respect yours as well as the future opinions that may be shared on this thread.