Hm.
something falls on deaf ears
a statement, opinion, or suggestion is ignored.
Jennifer suggested that Harold should get a job, but of course her advice fell on deaf ears. falls on deaf ears - Idioms - by the Free Dictionary, Thesaurus and Encyclopedia. fall on deaf ears if a request or advice falls on deaf ears, people ignore it.
Appeals to release the hostages fell on deaf ears. Warnings that sunbathing can lead to skin cancer have largely fallen on deaf ears in Britain. fall on deaf ears - Idioms - by the Free Dictionary, Thesaurus and Encyclopedia.
It can apply to one person or more than one person. (Harold is only one person, but he has two ears.)
~R