This lightweight plugin fixes and prevents the exploit with glowstone that allows players to see through blocks. This prevents an unfair advantage commonly used in factions to find secret parts of bases or in survival to scout out caves. It can allow the exploiter to find minerals such as gold far faster than it would take them normally. Faction servers can benefit from this too, as secret parts of bases will actually be hidden.
A check is run every 25 ticks on each player to check if there is a glowstone 1 block above them (their head). If a player has glowstone a block above them, they will be killed to prevent the player from cheating.
Simply drag and drop. No config, let the plugin do everything for you!
As you can see by the picture, I found a dungeon and a large cave system with gold. Players will no longer be able to cheat their way to wealthiness.
Credit to: Ghilliedrone