polling place or fragenbogen

A section of the German electorate is gifting its ballots to expatriates and EU citizens unable to influence the outcome of the campaign via a social-media group called Electoral Rebellion in order to lend a voice to those outliers affected by Germany's stance in the European Union, like the Spaniards and Hellenes in the face of austerity measures and others further afield with the potential to be touched by new German policy. From a legal standpoint, it appears, that the volunteers are simply soliciting the advice of foreigners, and participants—with no expectation of quid pro quo, would have probably voted for the candidates most sympathetic to the views of those voting by proxy, but the action does raise a needed discussion on supra-national politics and infringements as well. What do you think? Is this action, stunt not far from buying and selling votes or a broader and necessary world-view?