I agree that you should be able to get in contact with the website owner. However, I believe it'd be better if a person had to at least query denic to get your address. That's easy enough if you have to resolve a serious matter and the website owner is also a bit more protected against abuse of their data.

To get whois info for .de you already have to solve a captcha and write a paragraph about who you are and why you need it.

Email address is enough for that.

An email address is no Vorladungsfähige Adresse. You can't sue that, you can't send a Gerichtsvollzieher to it, and you can't seize the owners assets with it.

If I want to send an Abmahnung to a website owner, because they publicly defame me — as has happened before — then I need something stronger than an email address. Or I need to invoke the right to be forgotten, but I don't want to do so, I prefer having a way to eliminate the source.

You are talking about an Impressum. No need for that info in the whois.

The topic was Impressum. The user starting this subthread complained about Impressum.