I am not a vegetarian, but I respect those who make that choice for themselves, so long as they don't sit across from me at dinner, calling me "murderer" and whatnot.
I'd also like to point out the flawed logic that I'm seeing here by the (apparently) anti-vegetarian crowd.
It's wrong-minded to criticize people for making a different diet choice than yours, especially so to suggest that they are stupid. vegetarianism, if followed with some intelligence and education, is a very healthy way to live. Vegetarians are exposed to fewer carcinogens and are less lkely to get sick from the food they eat, as well as being less likely to develop common animal-fat consumption problems, like congestive heart failure. Also, it's not at all hard to form the necessary nutritional bonds by eating a varied diet of legumes, tubers, roughage, fruit, nuts, etc.
Not to mention that it's considerably less expensive to subsist on a meat-free diet.
As for those vegetarians you might now who are malnourished: don't blame it on vegetarianism. Blame it on poor diet. They are making the wrong choices about how they eat, in much the same way that meat-eaters who chomp down on ex-animals indiscriminately may find themselves overweight and with clogged arteries.
The "they're going to be killed and eaten anyhow, so why not join in?" argument is - forgive me for being blunt - ridiculous. Cattle, as an example, do not exist for the sole purpose of being eaten by humans. The fact is that humans have bred cows (and other livestock) for that purpose. Trust me, those bloated things you see grazing behind fences alongside country roads certainly did not evolve to live that way. "Everyone else is doing it" is not a reason to change one's moral stance.
All that said, I'm still a happy omnivore. I do like my steaks, burgers, chicken breast, roast turkey, shrimp, fish, pork chops, escargot, calamari, and all sorts of other beastly feastlies. And I don't plan to give them up anytime soon.
My point is that one ought not demean people who choose, for whatever reason, to forego eating meat, just because you don't happen to agree with them.