I have found your either dont care or you do. Hybridisation happens in the wiled all the time Roach and Bream Hybridise all the time in a lot of Irish rivers you get what you think is a huge Roach and then when you look closely its got the wrong mouth etc. When I got my RTC/TSN cross some people (on here) told me it was a Frankenstein fish and I should kill it! I think the likes of the flower Horns has opened up another part of the hobby and even though I hate Parrots I must admit they are a best seller tough as old boots and grow to a reasonable size. I think it has its place if you dont like them dont purchase them simple as.
If you want to bang on about ethics how about tattooed fish and worst of all ones injected with colouring. Now thats an issue!