Most zoombombing incidents are ‘inside jobs’ according to a study featuring researchers at Binghamton University, State University of New York. Zoombombers disruptors join online meetings to share obscene content and cause chaos. Authorized users share links, passwords and other information on sites such as Twitter and 4chan, along with a call to stir up trouble on the social networking site. The research team found that the problem is not restricted to just one country or time zone.
Source: https://www.helpnetsecurity.com/2021/02/09/most-zoombombing-incidents-are-inside-jobs/