So if you guys are saying that Nintendo does this to follow a law, does Microsoft and Sony have to do the same?

If they keep what up?  Are you really blaming Nintendo for this?  Get a clue dude.

Since both of thier HQs are in UK they don't.

No, why would it? They are based in two different countries with different laws.

Edit: Again, Nintendo has said they are trying to fix this. (Acording to other people in this here thread.)

Title of thread is silly.  If Nintendo thought you were a kid, you wouldn't be allowed to purchase it after midnight either.

Nintendo thinks all kids own there consols lol bad joke.
Anyway they should fix it soon,

Or they could just apply the laws based on time zone / ip / location - since you know it's quite easy to get the location of hardware from it's IP address, or to simply impose the restriction only on consoles with the time/language set to german - restricting an entire console for an entire region just because of a single country is a really bad way to go about it, doesn't matter if the company is based in germany or not.

Though one can't help but wonder if Nintendo knowingly chose germany because of the law so they could use it as an excuse to extend their overbearing, protective hand across their community.

What anime is this!? exploding face was a shocker

Congressmen would love this having their law being spread on a whole nation from one of the best establish brand and infect their fellow kingdoms... lol

Yeah, the same German law that restricts downloading mature content on PSN and XBL too, rembember?...Oh wait...