Does the store slogan have the legal effect of stealing one and punishing ten?

In many shops, we often see slogans such as "stealing ten articles" and "forging ten articles". The format clause of "stealing one and punishing ten" made by the operator in the form of notice obviously aggravates the responsibility of the other party, and the obviously unfair is invalid. The notice of increasing personal responsibility is valid.

legal ground

Article 11 of the Law of People's Republic of China (PRC) on the Protection of Consumers' Rights and Interests, consumers who have suffered personal or property damage due to the purchase or use of goods or services shall have the right to compensation according to law.