One of the debates you will here often surrounding street photography is about its moral nature.
Many street photographers publish or sell their work and find themselves and others questioning whether it is right or wrong to profit off of their subjects. This subject comes up even more often when photographing people who are considered "less fortunate".Of course these arguments often ignore the fact that many street photographers help the downtrodden by bringing attention to their plight and rallying support for them.
However the question remains, are we as street photographers exploiting people?