This is a good idea, I like it.
I wonder if this would respect grief prevention plugins. I suppose it would depend how the plugin was coded. Since the item is activated elsewhere, if the plugin stops interaction, I don't know if it would work. If the plugin intercepts explosion events (I think some of them may), it would stop the explosion from damaging players/blocks, so it would probably work.
I think some testing with grief prevention plugins would reveal quite a bit!
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