To answer your actual question
what would have happened if freebitco.in, after the 4 negative feedback against wetsuit and the active flag, had come out the second week of June giving an explanation and saying that he was going to solve problems, leaving them solved at the end of June?
a warning would have been out there in the community, but people are morons and half of them still wouldn't have listened to the warning. There are probably a good number of people who bought tokens who are not even on the forum.
I don't think people are necessarily against preventive feedback as you call it, but just feel like tagging people for a scam that hasn't happened yet is an incorrect use of the trust system. Been saying for a while that we need 2 different trust systems, 1 for reputation and 1 for trading, or we just need to adapt the current feedback system and let it be used for more than trades.
People leave feedback for damn near anything anyways. May as well use it as a hybrid system and combine trade and reputation as 1 system.