Fall on deaf ears

The internet slang term “fall on deaf ears” means that someone’s message or suggestion has been ignored or disregarded by others, typically in a digital conversation or online community. It implies that the person’s words have not been heard or taken into consideration by the intended audience.

Examples:

Tom tried to warn his friends about the new scam on social media, but his advice fell on deaf ears.
Sarah suggested adding a new feature to the website, but her proposal fell on deaf ears as nobody responded or acknowledged it.