This behavior is called active scanning and is part of wifi spec. All wifi clients do it: https://www.wi-fi.org/knowledge-center/faq/what-are-passive-and-activ

This behavior is called active scanning and is part of wifi spec. All wifi clients do it: https://www.wi-fi.org/knowledge-center/faq/what-are-passive-and-active-scanning https://www.wi-fi.org/knowledge-center/faq/what-are-passive-... If you go to defcon and open your laptop there are usually screens that show all of the networks nearby devices have previously connected to.