I walked around with the sign in Stuttgart for 2,5 hours in the main shopping road, where I talked to some people. One man was interested and made a photo of me and the poster.
Akado, back in Germany, because of family. I told a coffeeshop about it. There are several users who live in the netherlands, maybe they have more luck.
Edit: Later another hour and a half. People like it, someone said that he thinks i have cojones and that he will check it out.