Do not do anything to the plants yourself. Sometimes they are boobytrapped or have traps near by. As for what to do, that is a moral dilemma you have to face. Bear in mind dependant on the area, if they are full grown they may be worth 3-$4000 a piece. So you may make an enemy or two. Reguardless on your decision, no need to go back into the area until all the leaves have fallen off the trees in your area.