Well, he's a "guest". The rules don't seem that harsh and most are common courtesy. If you're a guest, don't be a jackass, basically.
But being a jackass (or grabass) is how this whole mess started (allegedly). One odd aspect is the way some people approve of Assange, yet disapproved of Kavanaugh's election to the Supreme Court. I guess Assange pre-dated a lot of the #MeToo attention. Also just as well he didn't try hiding in the Saudi embassy, although they do seem rather handy at disappearing people.