I'm not sure that you're negating the rule by doing this. Just thoughts:
I was in a relationship with a narcissist. Once finally out of it, I fully let go. Even two years later, he finds new and creative ways to reach out to me, and I again block him.
If I was him in the situation, I think I'd want someone to do to me what I'm doing to him. It's the only thing that might lead to self-reflection on his part, encouraging lasting change.
Also, I'm currently treating him exactly as I want him to treat me...with silence. I want him to leave me alone, just like I'm doing...