Leaving a negative feedback because that account was banned is not a correct use even the information is true.

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That's why, among other things, I have him on ignore and on my distrust list.

If you distrust him, you will see it as untrusted negative feedback because it is in Red.

Yes but since I distrust him, it's fine with me if he wants to put it in red or hot pink. It has no credibility for me.