Hello, I'm a student. I was in the middle of online class and someone started swearing on the Ms teams chat. It had turned out there account had been hacked. It happend to many others. Then they unmuted an A small child(probobaly a voice changer) started speaking. He/she said hello then muted and left the call. After this a bunch of people got removed from the meating but the host didnt do it. Thank you!