there was a prank way back, that used simple html, css and javascript, to instruct the browser to display IP address, public, and local, popup a stream from the webcam, and place them among a crafted document intended to trigger i.e. troll people.

no data was cast to internet, it was all code executed with local user permissions to access the devices devices and logfiles displayed inline as "proof" that you are standing on stage with naught but your drawers.

people were at times moved into a panic and could be manipulated into making contact with malignant entities. there were casualties.

never underestimate the damage that can be caused by manipulating perceptions of the current situation,its not a joke, its handgun serious.