You're conveniently avoiding the fact that you had to lie about living in Russia to do so, evading your own country's taxes in the process, though. ^^Plus it is worth nothing that these sales aren't from "shady" 3rd party key-resellers that acquired keys through dubious means, but from Nintendo Directly.
I won't lie, If I was the developer I'd be a little annoyed (Depending on the volumes of people buying from outside their region), but you can't exactly blame a customer for taking a cheaper option when it has been presented to them, especially if it's through official channels.
I'm not by any means trying to judge people for going for the cheaper option, but let's not pretend like it's through an "official channel".