I'm giving it a try since I had previously used a much short list. One thing to be careful of is auto-completion tools. Something like `ssh <tab><tab>` could

I'm giving it a try since I had previously used a much short list. One thing to be careful of is auto-completion tools. Something like `ssh <tab><tab>` could dump the 30k list to your console as zsh + prezto does in my case. To workaround this, I run a local DNS server (DNS masq) and provide it 'addn-hosts=/etc/hosts.blacklist' and place the blacklist there.