I have a lot of people I don't want to exist(my best friend included)but they may not understand they are rude to you or in their perspective they may be correct so if I had a switch which would erase people I hate then I would destroy that switch immediatly.All the people I hate have their own lives and people that loves them so erasing them would really not be way to solve the big puzzule ,if think calm mindedly,you will understand!!!!!!!!!!!!!