I hate seeing humanoids with black eyeballs. It makes it so much harder to relate to them. Now I'm not a judgmental person (except when I take an instant dislike to someone because I don't like their hat) but if I see a reptilian creature with bat wings I cross the street. I think it's because I don't want to get caught up in all their drama.
Congratulating people whenever they contribute to the human over-population problem is an important, profitable niche in the greeting card market. I may suck at inventing business concepts (cards that you shouldn't send to anyone?) but I'm going all out to meet my professional obligations today.