as a server admin/owner, if you're using modify world, and want to stop griefing from an item, using modifyworld works, easiest syntax to use is - -modifyworld.item.use.(item id).* you don't have to put anything beyond that since it'll cover everything. We allow people to use their rm/dm tools but if someone griefs, we remove the ability for a day or so. You can use that for dr. phil's stone also, and it's still usable in the crafting table. It doesn't block the recipes from being made, but we use a recipe blocker for that. And if you use that method, don't allow the use of crafting table II because they allow you to make said banned items and has a dupe glitch. So everyone has learned to keep their tools in check, and warn people not to use them in the wrong way. As my uncle once said, "With great power comes great responsibility."