I'm really getting tired of the whole "when you're on this person's website, it's like you're a guest in their home," shtick.
No, being on their website is not like being in their home just because both are privately owned. Their home doesn't have an open-door policy for anyone to enter and leave as they wish, and they certainly don't plaster their home with ads. If you want to say that there are levels of decorum that should be respected, that's fine, but that's not the most convincing argument.