Jesus and the fig tree; is WWJD really a good idea?

One story from the Gospels has never made sense to me: that is the story of Jesus and the fig tree that withers. He is hungry and sees the fig tree. It states that there were no figs on it, because it was not the right time of the year for there to be figs. Jesus gets upset when there are no figs, and declares that the tree will never bear fruit. Some people say there would have been early figs on the tree, small unripened figs that still could be eaten. If this were the case why was this not stated in the story. It only says that it was not the season for figs, not that it was not the season for mature figs. When the disciples go back by the tree again it has withered. This is supposed to be a story about the efficacy of prayer. It still seems to me to be impetuous behavior. Even if what is said about the early figs is true does this mean that there would never be figs on the tree. Maybe the tree would have been able to bear fruit another year. We are told to be patient, but this behavior does not show any signs of patience. WWJD, which stood for "What would Jesus do?"was seen on clothes, mugs, bumper stickers for quite awhile. I do not think it is always a good idea to do what Jesus would have done. Even some theologians have stated this. True religion can not be easily summed in a trite phrase like that one. It seems to trivialize it.