@brodehouse: If we continue with the school analogy, Ideally you'd have teachers or school police or something to kick those jackasses out. That isn't being provided right now, so the kids need to fend for themselves.
Like I said, shared blocklists are not a perfect tool. I'm not even sure they help a lot in this particular instance, but I don't blame folks for using them to deal with the enormous amounts of hate speech and abuse being flung at them through Twitter. If that sounds too authoritarian for your tastes then take a look at the #burgersandfries IRC logs. Over 3700 pages of chat dedicated to making Zoe Quinn's life as miserable as possible. And that's mostly just her. One person dealing with all that crap targeted at her.