How do we know what they were ordering? They could have had their water bottle refilled, having a coffee from a Keep Cup or ordering a veggie meal. This photo has lazily done the rounds as proof that all of ER are somehow hypocrites.
They could have been ordering a meal with meat and, you know what, who cares if they do? As I said in the climate change thread, we can't go and live in the woods. The modern world still exists and these people seek to make it better. Some may come across as anti-establishment hippies with nothing better to do than camp out like the world is one big festival, but let's judge the collective instead. They're bothering to do something and they're getting noticed. The people who should be chastised are those who do nothing at all, not those who try but aren't perfect.
95% people living sustainably imperfectly is better than 5% living totally carbon neutrally. Let's aim for that instead.