I could care less if folks fish for spawning fish, it is up to each individual to do what they want as long as it is legal.
I have done it, and anyone who feels it is easy is mistaken. It takes incredible skill and luck to be successful, and 99% of the fisherman will fail.
What would erk me, is the poor handling I see examples of all the time being employed on spawning fish, or really any caught fish. There is nothing more rampant than mishandling of fish which are meant to be released. Look around this board from time to time for clear examples. I have fished with a few over the past couple of years that are as bad as any when it comes to properly handling a fish which is meant to be released.