[clarry]

It is giving consent, in some sense. But make a popular website use visitors' browsers to launch a DDoS attack and you'll find that "anything goes as long as it's the bounds of the sandbox" doesn't really apply.

Apart from that, people can easily take a different view altogether. When I visit a site, I download some bits. Doing so I don't consent to anything -- what I do with these bits is up to me.