A good example of this happening was CITM who had an outsized trust list that was not kept up with, which resulted in many scammers eventually getting onto DT via him; after some time, it became widely known his trust list was not good, and there became calls for him to be removed from DT1 (IIRC, he was only removed when he gave a frivolous rating to Dogie, which IMO was far too late).