If someone got negative trust for lying, the trust rating of the majority of this forum would be in the red. It's not correct to use the trust system in situations unrelated to trading in this way.
It has become annoying that the trust system has been used for personal ambitions rather than trading in this forum for a long time.
Which is why i've said many times that we need a reputation trust system and a trade trust system. At least if we had 2 different systems we would have more things to complain about as people would misuse 2 systems instead of 1.
You bet! The current trust system already leaves some folks scratching their heads. Can you imagine the chaos if we introduced another layer of complexity with a second one?

But I agree, the current system has its flaws and definitely leaves plenty of space for drama. In my opinion, it should be fixed. Introducing some form of voting for negative trust ratings, similar to what we have for flags, might help improve things, even if only to some extent.
For instance, in cases like this one, where BenCodie clearly made a bad judgment call resulting in an undeserved negative rating, DTs should have the power to overvote the OP and change the rating from negative to neutral.