A somewhat loopy YouTube ‘star’, Australian Leanne Ratcliffe moved from promoting veganism to “living sustainably” in February 2017. Known for what she terms “call out” videos – in which she controversially mocks others on their diet and lifestyle habits – Ratcliffe shares such information as how she has just one pair of socks and five sets of underwear and publishes eBooks with titles such as Go Fruit Yourself. She has 40,000 followers on Twitter and claims to be “saving the planet, one banana at a time.” Okay…