This software is not made for making the Crawlers go away. It is an aggressive defense mechanism that tries its best to take the blunt of the assault, serve them garbage, and keep them off of upstream resources. Even though a lot of work went into making iocaine efficient, and nigh invisible for the legit visitor, it is an aggressive defender nevertheless, and will require a few resources - a whole lot less than if you’d let the Crawlers run rampant, though.