I usually refrain from using my blog for negativity. If I have an issue with someone, I will handle it privately unless they choose to become disruptive in the comments section. Then, I will draw upon wisdom in handling it without attacking the individual.
I have written about "life" situations, but I always use anonymity with names, usually not writing about things that would be obvious. I tend to write more about things in the news and even then, I will be sensitive to my readers.