I mean, yeah, I get that. That's why it's important to teach people internet etiquette so that they know not to use the same information over and over. That's vastly more practical than simply removing the information altogether. The internet is still fairly new, despite how long it's been around, and a lot of people haven't quite caught on that it's a public space and not a private chat where they can say whatever they want to their friends. On B.net there were times people would use downvote systems to try and hide posts from people they didn't like, so it's not like it's not vulnerable to abuse. I wouldn't even try to google who 'DarkAmbient' is but it would only really be a problem if you didn't have the sense to not use the same username and keep your private life private. Posts on the net are somewhat more permanent, but when people don't think about what they're going to say before they say it than they shouldn't be allowed to just whisk it away. In extreme cases it could create problems for people who could actually rely on the public information to help themselves.
Just because it's a law for one country (or, continent) doesn't mean that's the only country whose population is using the internet.