I can't say that keeping fish is Evil - but I have to say that I jump back and fourth between feelings on the subject. I think keeping a goldfish in a bowl is horrible - what a boring and meaningless life - All for the entertainment or "look" of a selfish human. That'd be like keeping a cat in one rooom with no friends.
bigger aquarium - With some plant life and nice atmosphere - and some friends - while I'm still back and fourth between good and bad on this one - I think It's probably okay.
Maybe I'm just weird.