I keep fish and eat fish, doesn't bother me at all. I have even thought about taking it one step futher, eating a fish I have raised.
I don't mean looking into a tank and thinking, boy that guppy looks tasty, but purposefully buying a fast growing fish (say tilapia or even a pacu etc.) and raising it for the intention of eating it once it got to the right size (ie big enough to eat, but not too big that its quality of life suffered from living in a tank too small). In many ways it would be similar to rearing your own chickens or a pig.
What's put me off is I read somewhere that some medications can cause cancer, and lacking a brand new tank that I know hasn't seen any meds or other unkown chemicals to raise this fish in means it probably isn't worth the risk. Would be nice if someone could clear this up for me or to hear from someone if they had done this before.