"That's part of the whole SSO mentality - it's their 'profile' across all of the services they use, not just an authentication thing."
This.
SSO is, mathematically, a decent idea. However, it was coopted very early on and turned into something that decreases security rather than increases it.
The Register - Independent news and views for the tech community. Part of Situation Publishing
Biting the hand that feeds IT © 1998–2021