http://api.stackexchange.com/docs/authentication has a really awkward sentence that I think may be missing something.
Perhaps
The most obvious work around, making authentication site-centric instead of network wide, would solve this it would make user's with accounts on multiple sites experience much worse.
was meant to be
The most obvious work around, making authentication site-centric instead of network wide, would solve this, but it would degrade the experience of users with accounts on multiple sites.