Do I have to join a tour group to complain about compulsory shopping by travel agencies?

not necessary. There is no need to be a member of the travel agency's newspaper group for compulsory shopping. Every citizen can stop and complain. If a tourist feels that he is forced to shop while traveling, he should keep the evidence and complain to the tourism department of the newspaper group travel agency in time to protect his rights. Travel agencies, defined by the World Tourism Organization, are "retail agencies that provide information to the public about possible travel, accommodation and related services, including service fees and conditions.