In a recent Think piece, Jonathan Spelman argues that while the potential for drunk driving ‘to cause harm shouldn’t be understated, mask-less shopping’s potential for harm is even greater’. From there, he argues that just as states outlaw drunk driving, they should adopt mask mandates for shoppers in order to save lives. Unfortunately, this argument assumes that (untrained) people use masks properly, are sufficiently compliant with the mandate, and that the Peltzman effect doesn’t apply to mask mandates, that is, people engage in riskier behaviour when they feel safer. However, there are good reasons to doubt each assumption, theoretical and empirical. The article concludes that we should be sceptical that the life-saving potential of masks justifies mask mandates.