This plugin can block commands, for example /plugin, configurable.
This is anti double/triple click plugin. It works preety well in detecting these cheats. It sends messages to admins, when a player tries to click to fast. This plugin was made to use on PvP pre-1.9. (It required fast clicking.)
Code (Text):/ac show - turns on sending messages to an admin executing these command.
/ac hide - hides these messages.
AntiCheat detecting doubleclick, blocking commands like /plugins.