In some cities you will find very few of these totems of popular football culture and yet in others they thrive. In the Hertha fan scene there is a tribalism in placing stickers and in doing so fans marking territory in competition with rival fan groups. This is part of the fan culture in Berlin like many cities. The variety of stickers seen on road signs and lamp posts whilst wandering the streets of Berlin is truly astounding. Naturally some districts have more than others. You'll find many in Kreuzberg but perhaps not so many in Dahlem.
The slideshow below shows some of the Hertha stickers I have seen mostly in Berlin but also in Vienna, Bratislava, London and Brighton. It is by no means comprehensive but it gives a flavour of what is going on and what can be seen if you care to look.