My response to Susan's article is, of course, intended to be humorous.  In logic it's called "reductio ad absurdum."  Of course I eat vegetables.  And also animals, except for primates, whales, or other species recognized as having high levels of sentience.  My underlying belief is that each individual creature should be presumed to have approximately the level of sentience generally ascribed to its species (yes, similar to racial profiling but applied to animals instead of humans); and that humans are entitled to dominion over all animals and plants because we have the highest level of sentience (or, if you're a Jew or Christian, because God gave us dominion over all the creatures of the Earth).  I live in hope that the superhuman Andromedans will never discover Earth -- they might drop us into pots of boiling water for dinner (When I lived in Boston I imagined I heard the lobster screaming when my friend did that to it).