New idea for poachers knife

I was reading an article on how the last of the white rhino now has 24/7 armed guards, and it reminded me the reason poaching is so bad -- it wipes out endangered animals. So, along that theme, why not change poachers knife so the respawn timer for mobs killed in the enemy jungle is increased by some amount? That way, if you poach something, the enemy jungler will lose some additional xp later on.