Isn't Match.com the site that is against eharmony.com for denying to match homosexual people?
If so, then this could be a subtle retaliation, showing that people have different orientations, some that are different than the majority, but still deserve to be respected and accepted.
If not, then it's just some annoying vegetarian who just can't stand the fact that humans are primates, and primates are omnivores. You go ahead and refuse to eat the flesh of an animal. You go ahead and refuse the vital protein and Omega-3 fatty acids that fish provides. You go ahead and refuse the vitamins that meat and poultry provide.
And if it's a question of someone refusing meat because they were shocked and appalled at the method of killing animals for consumption, you needn't worry. The industry is becoming more humane every day. And let's face it, many animals in the wild get their bodies ripped into shreds by the predators that eat them in order to survive. So don't feel too sorry for them. It's the circle of life, Simba. Deal with it.