Worldbl

World Blacklist Plugin
Commands:
/worldbl setspawn
	Sets the player location to the plugin spawn
/worldbl scan
	Makes sure there aren't any players in a blacklisted world. If there is, teleports player to the set spawn point. (Along with a message)

Permissions:
worldbl.exempt
	Allows access to all worlds. Exempts user from /worldbl scan
worldbl.admin
	Allows users to use the commands.
Features:

Every time a player joins, the plugin checks to see that the player isn't in a blacklisted world. (Unless they have exempt perm)

The plugin prevents players from entering blacklisted worlds with warp commands. (Unless they have exempt perm.)

Config:

The name of the blacklisted world(s), with 'world' as default.

Lang.yml:

All of the messages the plugin uses:

"You aren't allowed in that world."
"You don't have permission to use that command."
"The spawn point has been successfully set."
"Worlds have been scanned successfully."