Be careful while using OpenID
OpenID users be careful, while using OpenID.
Because OpenID is designed for user can login using single ID for sign in multiple websites,
but the thing is OpenId user always sign in using the external application.
In background user has silently logged in OpenID account.
Finally the user closed the external web application using signout.
Still OpenID account session is alive and logged in.
If you used this in a public computer the same OpenID account name also in cache.
with that another user can login to your account easily.
So signout both the external application and the OpenID too.
BEWARE OF OPENID