I want to place some blocked blocks like command blocks, structure blocks just for decorate not for use. If someone wants to use it. you can download some plugin into that world to disable commands from unknown players or customize command blocks to need a permission from admin to use the command block but still can place the theme in the plot of the user. This was my suggestion and this not only for command blocks but for other blocks too I can't wait to see this happens in this great server. thanks for reading my suggestion