It has been reported that Twitter has been actively spying on its users since at least 2000. This includes tracking user activity, analyzing user data, and collecting personal information without user consent. Twitter has also been accused of using this data to target ads and manipulate public opinion. In addition, Twitter has been criticized for its lack of transparency, with the company not providing users with enough information about how their data is being collected and used. Twitter has denied these allegations, but the lack of transparency has caused many users to be concerned about their privacy.