Veganism is totally unethical. Few plants have ever harmed anyone, and the ones that do, vegans don't eat (AFAIK). And in fact, they are one of the few forms of life that survive by creating (via photosynthesis), rather than destroying as animals universally do (via ingestion and digestion). See, the animals -- both herbivores and carnivores -- are guilty of death and destruction, so we are simply doing unto them as they've done unto others, and this is equitable. Few plants in this world are guilty of the same, so to claim their life to support our own is morally unjustifiable.