An anonymous customer is boycotting coffee shops due to the high surcharges for non-dairy milk options like oat milk. The customer argues that these additional costs are unfair, especially for those who are lactose intolerant or prefer plant-based alternatives. The customer notes that the cost of oat milk in bulk does not justify the additional charges, accusing coffee shops of profiting from people’s dietary restrictions or preferences. They call on coffee shops to treat non-dairy milk as a regular part of business, not as a luxury. Until then, the customer plans to make their own lattes at home.