Ignoring them doesn't work anymore because modern social media and communication tools have given them power that doesn't depend on whether you're paying attention.
They can send shopped nudes with your face on them to your parents, they can call & email your boss at work to try and get you fired, they can threaten to rape & murder your sister. Sure, ignore that, it'll go away.
It does go away, nobody remembers Boxxy/Katie of youtube/4chan fame? The horde went after her worse than threats and calls yet she's still there making vids. She didn't write a big victim blog or appear on Oprah (Jessi Slaughter) and the lynch mob quickly lost interest when denied their reaction prize.
Threats of course should be handled by police and not ignored, but the moment you seek media attention or acknowledge how the horde has "ruined your life" you are throwing gasoline on the fire.
They can send shopped nudes with your face on them to your parents, they can call & email your boss at work to try and get you fired, they can threaten to rape & murder your sister. Sure, ignore that, it'll go away.