It's not your tank, so why are you complaining?
I am 21 years old, and
I wouldn't turn down having a tank like that. It's cute, and comical.
It would be perfect for a child- especially ones with learning/attention deficiencies. As movement, and color are stimulating for them.
It's good for the imagination- and like you said- to each their own.
Hate it a stong word.. I thing you need to work out some of your own issues before you go hating on someone because of some pieces of colorful plastic in a fish tank.