Most (no, all!) of the fish I buy are natural colours, if people feel the need to change what they have already got without bothering to find out about more interesting fish on sale, then we will just end up with a mass of inbred, sickly fish where good specimins sell for stupid money and the offcuts are flushed down the pan. That would not be a 'hobby' of culture I would like to be a part of.
Shure, long finned neons, balloon mollys and rams, and dyed glassfish may look, *cough*, pretty, but the fools who expand this industry are leading us to a road where people new to the hobbie buy these fish without knowing the ethics behind them. If the rate of which we are producing new fish continues, we will end up with a hobbie full of people obsessed with the asthetics of it all, and not caring what the fish themselves are, nor how their new 'fish' were made.
Ok, so the occational long fined variety is ok, but when we take it to the extreme of glowing fish, injected with jellyfish genes, used as objects in neon signs on shops, we see its true horror.