Let he who is without long finned fish cast the first stone (to replace the manufactured decor in the tank). I used to have fancy guppies and fancy Bettas, linebred swordtails and black mollies. As a kid, I tried to linebreed metallic green wild form guppies. It's part of the hobby - the ornamental fish hobby.
I'm now part of the the biological fish hobby, and don't need the in your face colours, weird fins or human produced attributes. I have too much fun figuring out why nature selected for the things I see without clouding the view with things chosen by some guy in a basement in Philadelphia.
If you like modified and manufactured fish, keep them humanely. Don't expect me to say they're cute, as I prefer to keep my mouth shut around them.
I'll get excited at seeing a less colourful dwarf Cichlid or more naturally colourful killies than I ever will at a laboratory fish. I may want to learn about its habitat and natural history, and the unnatural history of ornamentals doesn't interest me.
That doesn't reflect on the fish owner. It would reflect on the producer of industrially deformed fish like balloons or glofish. I have a great respect for the (misspent, to me, but who cares?) skills of linebreeding aquarists. They learn genetics, and have to be very dedicated and meticulous in their work. I am more interested in talking shop with breeders of difficult natural fish who also need to acquire quite a skillset to follow their interests.
If a store sells celestial goldfish, balloon fish or other fish with painful or seriously harmful mutations, I prefer to buy elsewhere. If they sell glofish, I look at the market. Aquarium stores around here barely survive, and I know the one local place that won't sell glo-products hurts his bottom line with that. If he starts selling fishproducts, he has to survive. Those of us who buy all our fish from large online suppliers to try to save a few cents force shop owners to sell glofish to survive.
We can't be 'aquarium fundamentalists', as that way always leads to the narrow minded bashing of differences. I'd never suggest someone get glofish, blood parrots, polar things, electric blue things or long finned mutants, but if they go there, we talk fish and aquarium keeping about them. If I discover they're local, then I don't really want to see their tanks, but if I do I'll say "Mmmm, I like the location you picked for your tank" or something of that type..