If you don't have multiple names, you'll have a single name ('insane', or some new euphemism.) People with any sort of disorder would all get lumped together,

If you don't have multiple names, you'll have a single name ('insane', or some new euphemism.) People with any sort of disorder would all get lumped together, and human nature being what it is, others would tend to assume the worst of all of them. I find it hard to believe this would be an improvement over the status quo, as imperfect as it may be.