yes I sent, is it forbidden?
No.
I haven't used feedback since the day I became a member. In the light of the information I have gained for 2 and a half years, I wrote feedback to people I trust in the forum. what is the problem?
Lack of references or other indications of how those users are "unlikely to scam anyone".
Would it be more ethical if I did it over time?
Probably not. I didn't say anything about ethics or the significance of timing so this sounds like a loaded question.
why do you tend to draw bad things out of what people do?
I didn't say it's a bad thing. I don't trust your judgement is all.
What is the main problem?
I have a feeling you're gonna try to stretch this towards "racism".
why can't we trust each other and get rid of our prejudices.
Here we go again.
Do I have to prove to you and to each member of the forum what I am, who I am?
You don't have to prove anything. When you do or say stuff on the forum other people may form opinions about that. In fact, if you try too hard you might get unwanted results, so no, don't try to prove anything.
Now can we stay on topic please.