Self-introduction-1 Я не знаю, как удалять вопросы отсюда..

An article about big data "Researchers who collect their data from publicly available sources are at risk as well because the content providers or individual users may object to the publication of this data for further research, especially after the data has successfully been de-anonymized. The post-hoc withdrawal of research data, in turn, makes replications of the findings impossible and therefore violates a core principle of empirical research". Am I right thinking that "post-hoc withdrawal of research data" is the second collection of data because of objection? Thank you!