Meanwhile people like butterzone go around every day leaving trust for people who don't even have any direct involvement with them, but my use of trust to defend myself from harassment was wrong.

When the neutral trust option bubble was added a few days ago, I downgraded almost all my negs to neutrals as appropriate.
To be clear this isn't meant as an attack on you Butterzone but rather a prime example of how this behavior is accepted around here, is common, and is selectively enforced. I think users should be free to choose why they leave feedback, because there is no reliable or fair way to moderate it. I argue that people who abuse the trust system will simply not hold as much weight with users because it is clear trust is left flippantly by that user. Trying to moderate trust is a disaster and opens up avenues for all types of abuse.