Enabling forcefields for blocks

WARNING: You probably do NOT want to do this! This feature was just made for fun! IT WILL DESTROY YOUR SERVER!

Don't believe me? Watch this showcase of the blocks forcefield in action:

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Anyway, assuming you've read the numerous warnings I've given you, here is how to fully enable the blocks forcefield:

1. Give anyone you want to be able to use the blocks feature the forcefield.command.blocks permission
2. Add those people to the blocks.players list in the config. Do not ask me to remove this list, it's there to protect your server!
3. Set blocks.enabled to true in the config
4. Adjust the blacklist to your liking via blocks.blacklist in the config (by default, it will only push pumpkins)
5. The players that you gave permission to use the feature can now do /forcefield blocks [on|off] to toggle the blocks forcefield