Sadly, frivolous lawsuits are sometimes filed by plaintiffs who are suffering from a mental illness. But in most cases, frivolous lawsuits are filed for purposes of: Harassing the defendant. Being sued is incredibly frustrating. Even if the case is meritless, the defendant has to expend time, energy, and financial resources to have the case ... More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.