Is it permissible to mention in gatherings that a person is known for narrating fabricated hadiths and has been labeled by the scholars as a "night woodcutter"?

The questioner : A nobleman passed by some of the virtuous ones... some of those who author a great deal, and the majority of his books contain weak and fabricated hadiths... this man is among the people of knowledge... so is it correct, for example, if we sit in a gathering and this man who authors a great deal passes by, and the majority of his books contain fabricated hadiths, do we say that he is a "night woodcutter"?

The Shaykh : Yes, people must be warned against him; it is necessary to make this clear. Yes.