Ladder Stacking - This simply makes ladders be stackable, when you are placing a ladder to a ladder block, which makes it stack above or below.
Ladder Floor and Ceiling Placement - You can place ladders even without supporting blocks!
Bulk Destroying - Since destroying all of those stacked ladders are time-consuming, I made it efficient to destroy up-stacked ladders, and down-stacked ladders, by just holding the ladders to destroy it at easy. (Note: you must hold a ladder block in your hand to make this work, else it's just normal breaking or destroying.)
Customizable - You can customize this ladder placement, by modifying its griefable blocks, and disabling griefing for safety mode.