Last time I was in Germany (2015) I had to pay 50pf to the little emperor who ran the toilet in the Paderborn train station; I didn't see the sign about paying

Last time I was in Germany (2015) I had to pay 50pf to the little emperor who ran the toilet in the Paderborn train station; I didn't see the sign about paying (it was blocked by the open door) and he basically attacked me as I walked out. Not sure how this is a wonderful solution. I also remember a European airline wanting to charge people to use the toilet on their planes.