How about banned members with negative trust?
Lauda also had negative trust even before he left the forum and got banned, other members found some cases when he did plagiarism in his early days, but I think we have several sticky topics from him.
Some of them can be found in Beginners & Help, others in our local board, and maybe there are others I didn't notice.

I have nothing against members you mentioned in your example, but maybe it's time to check again all sticky topics and update what is needed.
It's not only issue with negative trust, but I think some topics are really outdated.