yes there are many here on psych central with this. here in the USA short version maladaptive daydreaming is a common symptom of mental disorders that have psychotic symptoms. psychotic symptoms are things like being out of touch with reality, not being able to tell what is real and what isnt. hallucinations and delusions. you might find people with this in the schizophrenia type mental disorder boards.

before may 2013 maladaptive dreaming used to be also part of dissociative problems but due to new diagnostic criteria concerning dissociative problems can not be because of fantasy \ play\ ....maladaptive daydreaming (excessive daydreaming) has been removed as a dissociative symptom. short version when someone is daydreaming to this extreme, they are engaging in fantasy thoughts, fantasy role playing on a mental level.

I sometimes slip into excessive daydreaming, most times out of stress or boredom. I have learned to control this through medication for my anxiety\stress and through the use of yoga and other physical activities when I find that I have slipped into excessively day dreaming.