Yes, you're right. You always have to ask! Does the pasta have eggs in it? Is the oatmeal made with milk? Is there butter in the rice? Lard in the beans? Chicken stock in the soup? And so on...
I'm a vegan primarily for health reasons, so I can let a few things slide on special occasions. But it's amazing what a plant based diet will do for your cholesterol, weight, blood sugar, etc. and with ZERO drugs.
I'm just curious- what do you eat? Give us an idea of a typical vegan day.