I'm, generally, uncomfortable with wild fish. many fish are now extinct (in the wild), because of our hobby!
Do you actually have a list of species which have truly become extinct in the wild because of collection from our hobby? I am not aware of any from collection, but a few from natural habitat destruction from human encroachment.
i agree with this, i stopped keeping marine fish because most of the fish are wild,
I hate this thought of "I can't keep a marine fish, it was born in the wild". Does no one here realise that the reef is nothing like Finding Nemo? It is a true eat or be eaten habitat where (for the vast majority of species) a very small percentage of the fish that make it out of the planktonic larvae stage even get near to a breeding age. I recall reading that the average life expectancy for a clownfish which reaches breeding age on the reef is 5 years. In captivity it is up to double this. On those figures it would appear that we have the chance of being far from cruel, but in fact being saviours for some marine fish by taking them from the reef.
As hinted at above, there is no black and white in this, but myriad grey shades.