i have been to russia many many times, not once have i registered like that, not once has any police asked for it, not once has anyone in russia tried to get bribes from me (only had that in kyrgyzstan and ukraine). it's really not something i'd really worry about. and the registration is supposed to be done by whoever provides the housing. so you really don't have to do anything, but someone would have to waste half a day and like 300 rubles for that
Germany