Well, "getting advice from / interacting with a hallucinated person with his own personality" certainly fits the "I hallucinate voices telling me to do something" template much better than "not getting advice from / not interacting with a hallucinated person with his own personality", no?
There is no way that hallucinated persons talking to you are classified other than as part of a mental illness, other than if brought on by e.g. drug use. The DSM IV offers no exceptions for the "tulpa" community ...
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.