Do not despise prophesies – 1 Thessalonians 5:20 (ESV)
While I will not go into all of what prophecies are and are not, I will say that all prophesies are proclamations from the Lord. Our response to these declarations should be acceptance (within bounds – read the following verse) rather than resentment. As the Lord's people, we should be receive these pronouncements with proper humility and treat those who give such proclamations as messengers of God rather than people who simply annoy and anger us. (Look below to the example of Ahab)