Connect with vegetarian and vegan friends from all over the world.
As a vegan I am constantly being challenged or made fun of but I have found a few "come backs" that seem to work great:
"Would you physically walk up to a live cow, pig, or chicken and bite it? Didn't think so..."
Or I always have "vegan food" on me and show them how they PROBABLY eat the same things ie curtain types of chips (crisps), fries, what ever comes to mind
Depending on how well I know the person I do my best to always invite non vegan/veggie friends over and cook a bomb ass meal and they always compliment me on it with a response like "that was actually really good" or "wow I cant believe that was vegan"
With all that being said remember that a lot of times for what ever reason after telling someone why you are vegan/veggie a lot of people feel the need to defend their selves about why they are so great for eating meat, or how we vegans "don't get enough protein". These are all such classic and cliche responses. I always tell them I am not trying to SELL THEM ANYTHING all I am trying to see is how you can not only better yourself but better the world around you.
Peace and love my veggie friends