What attracts people most, it would appear, is other people.
Trees are contagious; as soon as one neighborhood or street is planted, citizen pressure builds up for action from the next street.
People tend to sit where there are places to sit
The human backside is a dimension architects seem to have forgotten.
It is difficult to design a space that will not attract people. What is remarkable is how often this has been accomplished.
So-called 'undesirables' are not the problem. It is the measures taken to combat them that is the problem.