Leave Code After Removal

This plugin works but it leaves the schema code behind after deactivation and removal. i think plugin authors need to clean up after them ie, when a plugin is removed, it should be coded properly to remove all code so there are no other conflicts with future plugin installs.
Plugins that leave code behind are unacceptable and lazy work.
If you choose to install this plugin, remember that code will be left behind even after plugin deletion!