Lwaxy
Cute but dangerous
Who's to say that our reality isn't someone else's fantasy?
I am the fantasy of a very confused and/or boring person then

Who's to say that our reality isn't someone else's fantasy?
What you are forgetting is that it is not possible for one realm to enter another. Current theory states that it would take all the energy in a known universe to open a hole small enough for a few particles to pass through - and that's about it. However, particles in this realm know what is going on (and therefore affect) particles in other realms, which means interaction.