adc/ranged jungle invincibility

Ranged champions, especially the adc, is currently able to farm jungle monsters by abusing the aggro and deaggro radius of jungle camps. If I hit an ancient golem for example then place myself in between the walls of the jungle entrance on blue side next to the inner turret, then I can damage the monsters while they walk towards me, then watch them deaggro and walk back to their camp. Their health doesn't replenish fast enough to stop me from continuing to damage them as they deaggro and then reaggro, repeatedly. In this manner I can simply sit at the edge of their agro radius and farm while watching them move back and forth without ever hitting me. This can be done with any jungle camp except baron.