This is a very good guide for new comers to the forum.

I have read the OP. And it answers the most questions. To my wonders..

Positive: You should only leave positive if you think the user would not scam anyone, right? But do you need to add a reference link with some kind of proof? Or is it enough to have a strong feeling?
Is it better if you do a trade with a user and first leave Neutral and when you have done more trades
Neutral:  Other comments??? So neutral you can say what you think and want for example "BabyBandit is a idiot and I hate him" without reference link? That's fine for me because everyone have right to their opinion.
Negative: Then should it be with reference link with solid proof and not any "maybes"? Because if you gonna accuse someone for being a scammer at least I think you should have solid proof, then maybe start with neutral and when you got the proof change it to negative?

And last how important is a reference link? For me if you giving someone negative feedback you must leave a reference link, because if someone come and read it maybe 6 months later he should have a chance to understand why the feedback is there. Without reference link the Feedback don't tell anything at least in my opinion.
But with neutral feedback a reference link is not needed at least how I have understand it.

Also I  have swiped my Trust list and have added the people I trust and distrusted the people I don't think belong in DT in my trust list. Is that something you think is good or bad?

I hope you take my questions serious and don't see me as a "troll" because I am far away from that I just want to learn how things work, my start here was not so good I had a bad attitude against reputable members without right and I gonna  change that now.

Thank you in advance and Merry Christmas.