Prophets of God (when speaking as a Prophet) will only speak the words of God and Jesus Christ, not what the people just want to hear...
*Ahab rejects the words calling them evil because he doesn't like them
*Jehoshaphat trust the words of the prophets, even if its not good news
*Micaiah the prophet states he only speaks the words that the Lord gives him
*Pick your friends carefully - know who you are associated with (19:3)