I agree some are, and certainly they can be, but many are not. I've met people who are either members of PETA or have given money to them that keep dogs, cats, horses, etc as pets. They have no idea what PETA as an organization actually stands for.
I've also met vegetarians that didn't think beyond the obvious and were not consistent in their reasons. I met one a few weeks ago that bought kosher meat (apparently for friends, bbq's, her dog, but not her) because she thought kosher meant the animals were slaughtered more humanely (her personal big reason for being vegetarian). She had no clue what the different slaughtering practices were, and when I told her she was horrified that she hadn't bought "normal" meat.
Far more often than not I run into people who are not consistent/non-hypocritical than do I meet those who are, and it seems the more extreme they get and the more they pitch fits at others the less likely they are to be consistent.
Not that I feel you need to be consistent in your reasons, or even have a reason, to make a life choice that affects you and you alone. Do what you want, and more power to you, IMO. Just don't act holyier than thou and like I'm scum of the Earth and I'll gladly return the favor, thanks ;)

