SXSW is a place of privilege. It is also a place where many people try to innovate new ways to do good in the world. But that doesn't change the dynamic of how hard it can be to come face to face with your own privilege.
Using homeless people as mobile hotspots emphasizes the dehumanizing effects of homelessness itself. The reality is that homeless people are already treated as "part of the landscape" or, worse, as detritus to be swept away.