I don't have an issue with hybrids per se. My issue is when people sell them or even give them away saying they are one type of fish - when they obviously not. This usually occurs with people not knowing better, but in my opinion that doesn't make it ok.
I will say that I prefer to avoid hybrids in my tank. In my experience most hybrid fry tend to be rather drab in color and can really muck up a very colorful african cichlid tank.