Are vegetarians humorless? It’s the question being asked this week after a Red Robin television ad offended herbivores by touting its 24 types of burgers and then noting, with an implied eye roll and mock whisper, “We even have a Gardenburger—just in case your teenage daughter is going through a phase.” More on Shine: Mountain Dew Under Fire For 'Most Racist Commercial in History' The commercial, part of a new campaign ad series, aired for about a week before being rotated out, as was planned from the start. But it prompted outrage among activists and on social media outlets, with...