This plugin simply blocks players from using lava, fire or TNT unless they are allowed via Permissions nodes.
I believe a plugin (maybe with this exact name) existed in the Beta stages of Minecraft. My server depended on the plugin, but now that I can code I figured it would be cool to make my own.
Some plugins exist already that might accomplish the purpose of this plugin, like just lava, just TNT or a combination of some sort. This is made to be an all-in-one solution for servers that want to limit the use of TNT/Lava but still permit certain users (donators?) the abilities.
Self-explanatory - just add these permissions nodes to the group or individual that you want to have that ability.