In its 2010 report, Reporters Without Borders ranked the freedom of the press in North Korea as 177th out of 178, above only that of Eritrea. Only news that favors the regime is permitted...
I don't hear anyone threatening to pull it down.
The law itself is abysmal, but there's no reason for it to affect Wikipedia. It strikes me that in making this claim, Wikipedia is taking up a political fight. Wikipedia is not in any danger from the law, they're theatrically threatening to pull out, despite being unaffected, in order to draw attention to this. I'm against this abhorrent and ridiculous law, but I'm not in favor of Wikipedia making exaggerated claims and throwing its weight around on political issues.
This is clearly another case of too many mad scientists, and not enough hunchbacks.