Just let them fade into obscurity
PETA - People Eating Tasty Animals. Now that's an organization that I can get behind.
All joking aside, since the relevancy of PETA is...well...none, articles like this give them what they want the most: attention. People who are completely vegan are in general unhealthy and have to take supplements because our bodies are not designed to process plant matter effectively.
PETA is nothing more than the brown stain on used bathroom tissue.