The FBI has issued a warning about using Zoom. Zoombombers have disrupted meetings in New York, Texas, California and Michigan. Zoom said 200 million people used the app on a daily basis in March, up from just 10 million in December. The FBI is warning schools, in particular, to be careful. The website, Motherboard, found that Zoom was sharing data with Facebook, even data on people who are not Facebook users. Zoom says that was a mistake, but it's now facing a class action lawsuit.