What is your favourite login method?

There are way too many tools that now rely on a forced login/auth/id as a control/lock-in/pseudo-secure mechanism whereas it is not required by the actual task at hand.

For some tasks, it is needed. For a huge amount of others and most of them, it's an invasive market/control/payment tool.

Incidentally, there is a way to conduct a poll in HN:

https://news.ycombinator.com/newpoll