I think the pseudacorus iris is on the govt hit list now. It is illegal for it to be sold in some states. It is clogging streams and choking native plant growth that cleans our streams and feeds water creatures. I have a small tub of it where it cannot escape. I am thinking of eradicating it altogether as there are so many other non-invasive irises that I can grow instead. As for people not liking certain color of irises, I run into that all the time. I have friends who will only grow the jewel tones and others who will only grow the muted grays and sooty ones. Even on this site there are a lot of iris lovers who are not overly fond of dwarf irises. Tiny plants with tiny little perfect iris blooms are so charming to me and most of my gardening friends like them head high and big as saucers. Those are beauties too. smiles
