How do I get rid of the mackeeper popup from http://mackeeperapp2.mackeeper.com?
Add the following lines to /etc/hosts and mackeeper goes away forever:

127.0.0.1   mackeeper.com
127.0.0.1   www.mackeeper.com
127.0.0.1   mackeeperapp.zeobit.com
127.0.0.1   mackeeperapp.mackeeper.com
127.0.0.1   mackeeperapp2.mackeeper.com