Ahoj, chtěl bych se zeptat, jestli jde nějak i OPckum zablokovat příkaz /unban a i /op, /deop ? Předem díky

Dále bych se chtěl zeptat, co znamená tato chyba, protože se v logu moc nevyznám :/
Spoiler: zobrazit
Kód: Vybrat vše
2013-01-17 15:59:59 [WARNING] Method "public Plugin loadPlugin(File, boolean)" is Deprecated, and may be removed in a future version of Bukkit
org.bukkit.plugin.AuthorNagException:
at org.bukkit.plugin.java.JavaPluginLoader.getClassByName(JavaPluginLoader.java:284)
at com.earth2me.essentials.storage.BukkitConstructor.getClassForNode(BukkitConstructor.java:418)
at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.getConstructor(Constructor.java:321)
at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:331)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:183)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructDocument(BaseConstructor.java:142)
at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:128)
at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:480)
at org.yaml.snakeyaml.Yaml.load(Yaml.java:423)
at com.earth2me.essentials.storage.YamlStorageReader.load(YamlStorageReader.java:47)
at com.earth2me.essentials.storage.AbstractDelayedYamlFileReader.run(AbstractDelayedYamlFileReader.java:37)
at org.bukkit.craftbukkit.v1_4_6.scheduler.CraftTask.run(CraftTask.java:53)
at org.bukkit.craftbukkit.v1_4_6.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)