Architectural and urban design and planning can be part of the solution of social problems, though not necessarily so. The scientific explicitation and testing of hypotheses on the relationship between the professional tools, the (long lasting) products and structures built, and other social phenomena is far from finished, especially in respect of vulnerable groups in our society. These groups can be, and are, defined in great variety. The built environment is one of the available means to accentuate differences between people. Likewise it is easily used for negative (stereo) typing of people. However, environmental solutions also easily give rise to hope, expectation. This capacity of the daily results of our science should not be a manipulative device, but should benefit vulnerable groups.