Blocks mackeeper domain names by adding them into the hosts file
Simply execute mackeeper_blocker in the terminal.app and it'll add the domain names to the hosts file in order to block them (the script will ask for root password to be able to write in hosts file)
./mackeeper_blocker
Full tutorial can be found here: https://medium.com/@avatsaev/do-this-on-your-parents-mac-if-you-dan-t-want-them-to-make-you-deal-with-mackeeper-651f5343355f