It's hard to go vegan, vegetarian or any other thing out there. It's easy to tell someone to go Vegan. But the big problem is even people that have some will to do it, face the same issue, they don't know what to eat.
I think you vegetarians and vegans out there have some responsability in this. What can you do? For instance start posting some menus or recipes, that are easy to do with easy enough to find ingredients. For me this is a much effective way of convicing. Maybe I'm talking out of my ass here lol but the times I tryed to come up with a vegan menu, this was always the issue.