Share 'So what's the dumbest question/comment you've gotten as a veg*n?'

Other than the ubiquitous, "Do you eat fish?" of course. I think the one that took the cake for me was, "But if everyone stopped eating animals, we'd be overrun! What would we do with all those cows??" I'd heard about it before, but never actually encountered it. This person was dead serious. I couldn't decide whether to laugh in her face or throw something at her.