Well, yeah. The primary worry among tulpa creators is that it might get pissed at you and follow you around the house making faces.
They ought to be at least somewhat concerned that they have less brain for their own walking around the house.
And what, pray tell, is the salient feature of mental illness that causes us to avoid it? Because I don't think it's the fact that we refer to them with the collection of syllables "men-tal-il-nes".
You don't know? It's loss in "utility". When you have an unknown item which, out of the items that you know of, most closely resembles a mushroom consumption of which had very huge negative utility, the expected utility of consuming the unknown toxic mushroom like item is also negative (unless totally starving and there's literally nothing else one could seek for nourishment). Of course, in today's environment, people rarely face the need to make such inferences themselves - society warns you of all the common dangers, uncommon dangers are by definition uncommon, and language hides the inferential nature of categorization from the view.
If you had looked into the topic, you would know the process is reversible.
The cases I've heard which do not look like people attention seeking online, are associated with severe mental illness. Of course the direction of the causation is somewhat murky in any such issue, but necessity to see a doctor doesn't depend on direction of the causation here.
They ought to be at least somewhat concerned that they have less brain for their own walking around the house.
Ah, right. I suppose that would depend on the exact mechanisms, involved, yeah.
Are children who have imaginary friends found to have subnormal cognitive development?
...You don't know? It's loss in "utility". When you have an unknown item which, out of the items that you know of, most closely resembles a mushroom consumption of which had very huge negative utility, the expected utility of consuming the unknown toxic mushroom like item is
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.