I've had imaginary friends all my life. I always knew they were imaginary, though, so I can't see that there's any problem with it.

The interesting thing is how some of them evolve with time, while others remain unchanged.

Spaw's inability to get any of his imaginary friends to blow him is indeed a tragic case. I put it down to too much reading of Cheech Wizard in his formative years. Cheech was always expecting someone to blow him.