there is one instance where the user claimed his games were deletedHas there been any reports of any nintendo banning any nintendo network ID accounts? dont think ive heard of any so I think its pretty safe but there's allways a risk
and I know people buying used Wii U's and they said they are able to play and redownload all the previous owners games and play them so im pretty sure you could do what your saying and not have to switch id's at all
here it is
http://gbatemp.net/threads/oh-so-nintendo-can-remotely-delete-your-games.354768/
(I still could not figure out what he did to get these games deleted by nintendo , I appreciate if someone explains in a simple fashion, because I did not understand anything and could not figure out if it resembles the situation we are in )
the thing is I could not find any piece of info detailing the DRM system on Wii u.
I mean what happens when you buy 1 game from one nintendo ID and switch to another nintendo ID and buy another one(in my case not buying but applying the game codes I got from promo)
there is no info on it. And I presume it is the safest method so far (the safest I could come up with so far )