On other sites, yes - that's what I'm used to.
But on this site I didn't see anything that even remotely resembles anything approximating a "close" button; Clicking besides the popup won't do anything either. -- Liberationtech is a public list whose archives are searchable on Google. Violations of list guidelines will get you moderated: https://mailman.stanford.edu/mailman/listinfo/liberationtech. Unsubscribe, change to digest, or change password by emailing moderator at compa...@stanford.edu.