There is a group who are very concerned about the quality of cichlids in NZ, especially the African ones which interbreed so easily. If interbreeding continues there will be no decent fish left. As more fish turn up on the banned imports lists it is even more important we save what we have and encourage fish keepers to breed as pure a strain as possible.
When someone is offering fish for sale, if someone else suspects they are interbred, there is nothing wrong with a polite message being sent to that effect. The person selling may be unaware they are hybrids (or the person saying so may be incorrect for that matter) and welcome the information.
It is all in the wording - and some of it, unfortunately, leaves a lot to be desired. :-?