Will ignoring/NCing these narcissists destroy them?

Long story short, my siblings know that I was molested as a child by another family member. I don't wish to discuss it, so my siblings (Hating this family member) are just straight up lumping me in with this family member. These siblings are hardcore narcissists, to give you an idea they have all tried to harm their therapists for calling them out on anything bad they do. One of them has 9 DUI's to her name and one of them was once given ties from a deceased person to borrow for a job interview, and because they noticed how expensive the ties were they sold them immediately on Ebay for a profit.

These siblings have been creating smear campaigns against me aimed at my family, and have even been making Subreddits dedicated to smearing me and leaking personal information. I started ignoring them about 9 days ago and wow oh so shocking; the posts stopped about 9 days ago and I've heard nothing since. If I keep ignoring them will it destroy them? They have a tendency to get violent but I'm not going to involve cops because that will bring them joy.

What will happen if I keep ignoring them? My whole family has gone NC with them as well.