First, I became very sad when I first watched "Mermaid".
I don't think daydreaming is a bad thing, and nobody has the right to control one's thought.
What police was doing to a boy is not a right thing!
And, I felt very sad at the ending, too.
When boy was going in to the water, nobody stopped him, and there was no expression in people's face.
It was like telling "Go ahead because we don't need you.".
Excluding the people who is different is not what society should be like, I think, so that film was very shokking to me.