Except he is not a policeman and has no authority whatsoever to make accusations without proofs, if my thread was not allowed by the rules of the forum he could have reported me and my thread would have been deleted/closed
He's not a cop, but he is an old-time member who cares about the forum, and more importantly he's on default trust, so his feedback has weight.
Vod is a fair man and takes improvement with time into account, so if you realize your mistake and don't repeat it....he might reconsider his trust rating on you after a while. But I can't speak for him; I just know what I've seen with Vod in the past. In the meantime, you can still post and read and do pretty much anything on bitcointalk--and you can probably still do deals with that feedback. All is not lost.
I've sent multiple PMs asking him to change reputation since I closed the thread & wanted to improve collateral, I even proposed him to agree a collateral together if I ever do this again but he doesn't want to undo this
Leaving retaliatory feedback is not going to work in your favor. Even if his and the other DT members' feedback doesn't get removed, you really ought to rethink what you left. These people aren't against you. They don't know you except by your actions, and the no-collateral scams happen often enough that 99.99% of the feedbacks are well-deserved.
oh and by the way there's a sticky in the lending section which even Vod himself posted in with the community accepted guidelines: