Working near there, I have to say, the only reason I can say "good riddance" is due to a NIMBA complex.
For some background information. At the end of last year a full Occupy DC camp sprung up from only a handful of people, they got the permits required, and overall had rather good relations with the DC police. Those who were protesting made up the blunt of the protestors. They had port-a-poties put in, a running soup kitchen of sort, and a variety of other amenities that kept overall impact down (but balls did it still smell).
As the Occupy movement has kind of lost steam, the mixture of people who were protestors, and the homeless (who were displaced by the ODC people) went back to it's original distribution. Furthermore, the permit originally obtained by the ODC people was nearing it's end, which back in october was extended for
another four months.
The result has been a situation no longer adhering to the current permit, and it has just become a living quarters in a public park. This, I think though, has not posed much of a public risk, as there hasn't been any increase in crime, and for many homeless individuals it provides some nourishment that the otherwise overstocked soup kitchens might not be able to service.
I think ODC has been dead for a while, but the facilities set up there certainly provided a public good for a lot of people who didn't have much else to rely on.