The only real reason I can see to be a vegetarian is if you happen to dislike the taste of meat, and so you don't eat it, which I suppose technically makes you a vegetarian, but it's not on any kind of ethical grounds.
I'm a meat eater, so obviously I have no ethical problems with killing animals to eat them, but most vegetarians do, and yet they still consume dairy and eggs? Those industries have the same implications for the animals as the meat industry. The cows that produce milk are killed after a couple of years when they are no longer able to produce the milk, usually they are turned in to meat for people to eat. Same in the egg industry, male cocks are of no use and killed.
I have nothing against people who are ethically against the consumption of animal products, ie vegans. We just share different ethics. I just think it's hypocritical to say killing animals is wrong and then contribute to the dairy and egg industry, as most vegetarians do.
Also any self proclaimed 'vegetarians' who still eat fish, gtfo.