This very confusion was evident on Reddit this week when a user posted an innocent-looking photo of his parents' front garden, asking: "Were your parents, like mine, proud of their pampas grass?" ...
A USDA report cites a Lambrinos, 2006 study which found foraging animals like sheep and goats rarely chewed on pampas grasses. Pampas grass' insidiousness isn't limited to the loss of biodiversity.