In the example of Naboth, the Israelites were used to God intervening directly so if he was allowed to live then Naboth's relatives would have known for sure that God had his reasons and not to go against them.
Today God does NOT intervene in human affairs, despite what the WTS would have you believe. That's the whole point of Satan being in control of the world, no? Therefore, when (not "if") injustices are committed by the elders, by no means should you put up with it.
Of course my comments are directed at those who still believe in God, otherwise it's just a moot point.