You come back from Camping trip with a tourist backpack and decide to go to the supermarket for bread. But the guard says he won’t let you go until you leave the bag in the storage room.
What to do
Inviting you to leave your bag in the cell, the supermarket offers you to conclude an agreement on storage of things in exchange for a key with a number. And you can refuse - no one has the right to force you.
If you are not allowed into the store with a bag, this violates your right to make a purchase. It is against the law for the supermarket to choose who sells the product and who doesn’t. . Record of violation should be left in the book of complaints and suggestions, take a picture of it and contact the Rospotrebnadzor.