Because it's so utterly stupid:
Nintendo blocking 18+ Wii U content in Europe until 11 p.m. - Report - GameSpot.comNintendo of Europe is blocking Wii U content in the region that is rated PEGI 18+ between the hours of 3 a.m. and 11 p.m., according to a Eurogamer report. Under these stipulations, the four-hour window of 11 p.m. to 3 a.m. is the only time users can purchase games like ZombiU or Assassin's Creed III or even view trailers for such games.
The story originated from a NeoGAF forum user, which reportedly received an email from Nintendo saying the following:
"Dear customer, we would like to let you know that Nintendo has always aimed to offer gameplay experiences suited to all age groups, observing carefully all the relevant regulations regarding content access that are present in the various European countries. We have thus decided to restrict the access to content which is unsuitable to minors (PEGI) to the 11 p.m.- 3 a.m. time window."
Eurogamer has since verified the claim. It received a message stating "You cannot view this content" and "The times during which this content can be viewed have been restricted."
Nintendo has yet to comment on the matter.