Quickly rewrites a domain to 127.0.0.1 in your /etc/hosts file, so you can concentrate better.
Use at your own risk. No tests and /etc/hosts is an important file for your system.
Make sure you Ruby setup is also working for root. Then do
$ sudo gem install nomore
$ sudo nomore twitter.com
$ sudo nomorework
Copyright (c) 2014 Jan Lelis. MIT-LICENSE.