Assuming "paywalls" translates to some form of "walls", it would be delendi sunt or delenda sunt. Murus for wall is masculine, and moenia for walls of a city is

Assuming "paywalls" translates to some form of "walls", it would be delendi sunt or delenda sunt. Murus for wall is masculine, and moenia for walls of a city is neuter. Damn, that Latin degree pays for itself more and more every day.