First, full disclosure: I respect anyone who can be a ‘true’ vegan just because of the sacrifice they are making in order to minimize suffering. Also, the article I will link to will make you laugh a bit, so put that drink down.
“One of the major worries that vegans have about humanity’s meat habit is that an advanced alien species will come to Earth, see that we’re eating animals, and then think it’s okay to eat us. ”