I'd also be interested in an elaboration. It isn't much about the violation of the law itself but the violation of privacy; why do I have linkedin.com, spiceworks.com, techtarget.com, godknowswhat.com suspiciously dumping cookies in my browser?
(more text here: https://news.ycombinator.com/item?id=25028296)
Most popular user agents just keep all cookies by default, but it’s by no means given.