What is what does blacklist mean today?

Today, a blacklist refers to a list of individuals, organizations or entities that are not allowed to participate in certain activities or access certain privileges. This could be due to various reasons including past criminal activities, violations of regulations or policies, or association with disreputable groups. For example, a company may maintain a blacklist of individuals who have been previously convicted of fraud or embezzlement, and refuse to hire or do business with them. Blacklists can also be used by governments to ban certain countries or individuals from entering their borders or engaging in trade. In some cases, blacklists can be controversial and raise concerns about discrimination and infringement of individual rights.