Saul often gets a tough break when we talk about the kings of Israel. He was the first one, and he was followed by David, who was the favorite of God and ancestor of Christ and all kinds of other impressive things. Plus there was that whole thing where Saul was jealous and kept trying to kill David, and when they were picking a king Saul hid because he didn't want to be considered, and he lied and was cowardly and violent and rude. He started out as God's anointed, but everything went pear-shaped somehow.
According to the text, God sent "a distressing spirit" to Saul. In fact, according to 1 Samuel 16:14, God actually left Saul before sending the distressing spirit.
God left Saul and sent spirits to distress him, and then Saul started acting crazy. Let's put two and two together here. This goes along with some of the frustrations i've felt toward God lately: God sends spirits to trouble people and then they are judged by their peers and by history for a judgement God visited upon them.
I know Saul was not blameless. I just think it's a good idea to approach the people around us with grace. Who knows what kind of spirit God might have sent to them?