Skuld
It would be very useful for security and other purposes to have an event payload for methods received by SendCustomNetworkEvent.
Example method and usage:
[NetworkCallable]
public void MyCustomEvent(NetworkCustomEvent event, ...)
{
//check if the calling user is eligible to have called the method.
if ( PlayerInAdminList(event.requestingPlayer.displayName) != true)
return; //return and do not execute the method
}