[darawk]

> But if a site sends content to my machine... that's on them.

Do you apply this moral principle in other areas? If your friend leaves their wallet at your house, do you consider the money in it to be yours?

[TeMPOraL]

A site does not send content to you by accident. Literally the very job of a web server is to evaluate whether or not you met the conditions entitling you to content. A HTTP 200 response literally means "here, you can have it".