Never back down.

And yes, they will not turn back, shrink their ego, and cower in fear just because you were indifferent to what they are saying.

They are throwing stones at you. If you keep ignoring that, they’ll escalate, and start throwing big rocks to wake you up or get your attention.

You have to show them the consequences of trying to annoy you in a language they can understand.

It’s time to fight back.

Disclaimer: No contact is the only real solution to dealing with anyone from the dark triad. Do not attempt to do anything else if this option is available for you. In case it’s impossible, there’s no way on earth I can imagine being an easy target for them would do you any good.

I understand that not wasting your time or energy on them is highly recommended, and that ignoring them is the only definitive solution. As long as it is not impossible, you should live your life as if they don’t exist in the first place. In case you have no chance of doing it, that is, you still have no way out for some reason, for example, you can’t move out due to financial difficulties at the moment, you can’t implement the grey rock method and hope for the best. It would be a recipe for total disaster. They will literally use physical violence or sexual assault against you to make it inevitable for you to fully engage with them. You don’t want that to happen. If instead you were like a lion from the start, they wouldn’t find a way to make you instantly angry just as easily as they would in case you insisted upon ignoring them until they hopefully leave.