How do you keep unwanted busybodies out of your videoconference meetings? This analysis <https://arstechnica.com/information-technology/2021/02/zoombombing-countermeasures-are-ineffective-in-the-vast-majority-of-cases/> concludes that common measures like password-protected meetings and waiting rooms are ineffective because they guard against the wrong threats. One thing that does help is giving each invited participant a unique join link. Ideally this link can only be used once. But even if not, it still allows organizers to identify the source of a leak to a zoombomber.