He's cocky for sure, deserves most of what's coming to him, but do the family?
I don't think you can shut down /b/ or anything like that, it's not viable; I guess this is just a shout at the power of the internet, it's only going to get more powerful.
They dont have proof that /b/ encouraged him to do such things, also "power of internet" thats [censored] just becouse someone is mental doesnt mean its Internet fault.