Bitch doesn’t even know there aren’t lighters in Minecraft, everyone knows you use flint and steel. Also thats mean as f**k. Here is what I would do to him:
Trap him in chamber of obsidian with water inside and set their spawn point there. They can technically spawn in there since water isn’t lethal until you start drowning, or you just set world spawn to 1 block and trap them there. Anyways they would keep spawning and dying.