The Department of Justice and Offices of the United States Attorneys are warning that Zoom-bombing is illegal and those who are involved can be charged with federal and state crimes. Zoom video conferencing software has become heavily utilized for remote meetings, online classrooms, exercise classes, and family and friend get-togethers. The FBI released an advisory about Zoom-bombering attacks and asked that victims of teleconference hijackings file a complaint with the Internet Crime Complaint Center (IC3)
Source: https://www.bleepingcomputer.com/news/software/doj-says-zoom-bombing-is-illegal-could-lead-to-jail-time/