You can't go in here! No entry! Everywhere you come across signs telling you what you can and cannot do. What do bans do to us? How do we best deal with them? Are rules really only a hindrance and block us? How can bans be made meaningful? Dirk Purz answers these questions with the help of the unique, humorous and profoundly redesigned traffic signs by the French artist Clet Abraham. The author explains in a well-founded and smooth manner what function prohibitions have, how they affect our psyche and what they can trigger. Sometimes they call for resistance, are ignored and deliberately bypassed. Sometimes you can live well with given rules and they are welcomed wholeheartedly. Dirk Purz shows how multifaceted dealing with prohibitions can be and how they can be designed in such a way that coexistence and cooperation are as smooth as possible nothing stands in the way. Above all, it encourages a development-promoting look at rules and regulations. Questions about self-reflection round off this signposted guide.