Researcher Scans All IP Addresses of Austria, Finds a Ton of Things That Shouldn't Be Online (haschek.at)
Christian Haschek scanned the entire Austrian IP space and found IP cameras, printers, and industrial control systems and a range of other devices that should not be online.
At a defcon talk in 2014 (talk slides) they scanned the whole IPv4 space live, looking for VNC instances. At least, anything that responded to a SYN packet.
Then they took a couple months to connect to each VNC instance, if no password was required, grab a screen shot.
Leading to a series of talks of things that shouldn't be on the internet.
09F91102 no, 455FE104 nope, F190A1E8 uh-uh, 7A5F8A09 that's not it, C87294CE no. Ah! 452F6E403CDF10714E41DFAA257D313F.