agree, it is not right and the audience didnt have any warning and did not consent to witnessing something like that.
have heard about people ctb on stream once or twice only in the past few years, since i am not interested in it at all.
there is only one case i really know about— ruru chan. it was the first time id heard of a case of someone ctb in a live stream of some sort. i know people did it just personally didnt hear about any real cases. from what i remember (correct me if im wrong), ruru chan wanted to be a legend, which is why they did it. something about them being kind of immortalized that way i think. i think that the live stream participants were also urging them to jump. last i checked, ruru chans twitter is still up. they were 14 years old, this happened in 2013.