Full text of this Financial Times article is available at MSNBC, which used the appropriate headline: "German tourists told to be rights pests"
I am sure, Günter Nooke's appeal is well meant, but I just can't imagine a positive outcome of this initiative. Most German tourists will ignore Nooke's appeal anyway. Others will continue to criticize the breakfast or the swimming pool rather than human rights. A few tourists might lecture some service personnel about human rights violations they can't do anything, but I very much doubt that German tourists will talk to "people in authority" as Mr. Nooke would like to see.
One consequence of Nooke's initiative might be more cartoons about German guests lecturing their hosts, like in this Simpsons clip.
Also, check out this comment by US Fulbrighter Scott Brunstetter about the "arrogant German syndrome":
Over the fifty plus years of the German-American Fulbright program, we have done pretty well in countering the "ugly American" problem. Through direct experience in each other's society we bring direct interaction that can inform both sides of the cultural and societal norms of both Germany and the US; myths are dispelled and replaced with facts. Yet, we fall short in addressing the "arrogant German" syndrome, in part because it is relatively new.
Related post in the Atlantic Review: Germany's Culture of Complaint