I found these very difficult (with one exception -- one of the entries was mine). Perhaps I'm just bad at spotting the relevant cues, but I think actually vegetarianism and non-vegetarianism are probably easier to fake than (e.g.) liberalism/conservatism or theism/atheism. Being a vegetarian isn't a matter of all-encompassing worldview; you can turn an omnivore into a vegetarian by adjusting one or two opinions (e.g. on what sorts of diet are healthiest) or preferences (e.g., does meat taste delicious or gross) or values (e.g., is a chicken's suffering 0%, 1% or 50% as important as a human's), and it's probably not super-difficult for most thoughtful people to imagine themselves into the opposite position.