Tips: Do /kill @e[type=item,name=TNT] to kill TNT items from entering stuff like hoppers. When players first join set their permission to visitor automatically, enable custom permissions if you want. Have a lot of admins on your server for extra safety. Set a tickingarea around the command blocks Question: is the tag name tnt for only tnt or all items you put
there's a separate tag for each item in bazooka city's antigrief, (ie: tnt for tnt, fns for flint and steel, lava for lava, etc), because they all have different tellraw messages