Re:How Discord Stores Billions of Messages (2017)
by rcxdude on Tuesday August 24, 2021 @07:34PM
(#28296342)
Skype wasn't shoddy per se, but it was extremely aggressively peer-to-peer, which resulted in exactly this kind of exposure of connection information.
Skype (at the time, no idea now) was a very shoddily written piece of software. It was trivial to query the IP of any online user, even if they were not on your contact list or appearing offline.
You had to use a VPN or carefully conceal your Skype ID, I did work with a somewhat popular live streamer back then (so a VPN wasn't feasible), and their ID was a very random string that was not to be shared under any circumstances.