I like the login because my password manager is not filling in all the the time the details when I want to search for something without logging in.
But... once looged in it's easy to click on "Sign Out" accidentally instead of Help or my username.
Bang...I'm Out!
Isn't it possible when somone hits "Sign Out" to warn her/him that it's the the end of the forum browsing,may change her/his mind?