If you kill drizzt and take his equipment he will come and take it off you as soon as you leave bodhi's lair.

If you however cheated to get his stuff then Harpell will appear but say nothing, he will follow you every where and you wont be able to kill him, it also causes lots of problems when you try to pick items up. If you want to get rid of him the drop the equipment of Drizzt and co and he will stop following you