I know this has already been suggested but if I said support on it then I would be gravedigging and given warning points. I think to avoid griefing we should be able to kick non party members from our island. It will help with griefing. E.g: /is kick {Player's username} /is kickall Lets say you are hosting a party and you want them to leave because you got to go and thy wont leave. Then just /is kickall. Simple as that. If someone was griefing you just /is kick {Player username} also simple. It would cause less people to get banned for griefing or looting or lava killing. I got banned for lava killing due to someone not leaving my island. If this doesn't happen then CypriotMerks should edit the rules to say that we cannot kill players in non pvp zones unless there isn't a mod on to tp them away or they grief or loot.
I can see this command being abused. Players kicking people mid-trade to steal their stuff. Kicking people and then messaging them "lel u sukkkkk". What if a player's island is over the limit? Can a loitering player just stand out of the zone and not be kicked? Would use of this command produce lag? What if a mod is nearby? Can I kick them?
This would be very useful, and I can see people using this for stealing, but trading is usually done at skybase. Like Larry said it would prevent griefs.
I give it 50% support The other 50 is because people would abuse it like MegaDorkVikki said. good luck
No support, the potential for abuse is too high, and then recoding the plugin. Might require regions. Too much effort for the moment