I don’t go on and on about being vegan, I don’t mention it unless it’s unavoidable. However, I do silently judge meat eaters. How could I not? One of the reasons I don’t eat animals or the liquids that come out of them is for environmental reasons: being vegan is the single biggest thing we can do to avoid environmental damage, and most people know that now, so of course I’m going to judge people that choose to carry on eating animals just because they like the taste. I just don’t tell them I’m judging them.
And I don’t get the argument that you’re a hypocrite if you do anything that hurts the environment or animals, such as go abroad, or consume electricity, or drive a car, or wear leather (I haven’t been able to work out what’s worse for the environment, leather or plastic shoes, for example – I haven’t bought leather shoes for ages, but I don’t want to buy plastic either, and I don’t want to not have new shoes ever, so it’s difficult). All ethical choices are difficult, and sometimes we just do the best we can. For me, personally, it’s less of a sacrifice to not eat animals than it is to not fly, so that’s what I do. It doesn’t make me a hypocrite. We all do what we can do. I’m sure people will judge me for that, and I don’t care about that, as I expect others to not care about my judging them for eating animals.
The bottom line is, none of us is perfect, we all do what we can - and ultimately what we want. It seems obvious TO ME that it’s better not to eat animals or exploit them in any way. But I know most people disagree, and there doesn't seem a lot of point discussing it or trying to persuade them otherwise. The only time I discuss my veganism is when people insist on quizzing me about it – often quite aggressively – if I have to acknowledge it.
Incidentally, the Vegan Society definition of veganism is ‘a way of living which seeks to exclude, as far as is possible and practicable, all forms of exploitation of, and cruelty to, animals for food, clothing or any other purpose’. I’m not a perfect vegan because I wear leather shoes sometimes, and very occasionally eat eggs from our rescue hens, but I’m seeking to exclude as far as possible and practicable all forms of exploitation of animals. (I'm not a perfect vegan but I'm still not a hypocrite.)