Germany and this ridiculous requirement: http://www.enforcementtracker.com/?imprint If you put a website online you've got to put all your personal information in it.
Not any website. If it is purely private and non-commercial you don't have to. Also, it doesn't have to be "all your personal information". Your Name is required and an address where you could be served with court papers. A P.O. box is not required, but the address where your company is located is fine. It doesn't have to be your private home address. An email address is required, but that again doesn't have to be yo…
Unfortunately, this does not include a lot of websites that most people would classify as private. For example, a blog still needs an Impressum.
In addition, you will even be classified as commercial, and therefore require an Impressum, if you don't make any money, for example if you use ads to (try to) pay the hosting cost.
> A P.O. box is not required
In fact, you'll have to pay a fine of usually 5000€ if you use a P.O. box without a summonable address.