I have recently concluded that there may be a hidden benefit to being in the company of a vegetarian. Suppose, heaven forbid, you and your company find yourself in a situation not entirely unlike that of the Donner Party. Having vegetarians among your group simplifies the potentially tortuous decision of whom to cannibalize first. (But only as a last resort, of course.) Finding yourselves already unable to subsist on the land, the vegetarian has no dietary options. Further, someone who refuses, on whatever grounds, to eat beef is an unlikely candidate to partake in the consumption of human flesh. In all likelihood, weak from a lack of protein, the vegetarian will collapse on his own saving you the trouble of a gruesome and evil murder.
So do not shun the vegetarian. Keep him close. He may one day be your only salvation.