1) Kick command does not work at all if used in server side scripting events. https://community.bistudio.com/wiki/Arma_3:_Server_Side_Scripting
```
onUserConnected = "kick (_this select 0)";
```
in server.cfg will not kick you. `ban` works OK.
2) kick command(maybe other too) typed in chat does not support special chars and even spaces if you trying to kick by nickname.