My work is in social movements, which on the surface seems just the right fit. We are at the beginning of the planning stages, so really I can shape it in whatever direction will suit my scholarly needs. However, it's very clear that what the community organization needs is data that will support its advocacy agenda: information on inequality, bad treatment of the group in question, structural barriers to success for said group, etc. I can help them collect that data, to be sure, by designing quantitative and qualitative measures, administering surveys, conducting interviews, and so on.
There's something that troubles me about the public sociology discourse [or at least what perceive to be public sociology discourse... perhaps I'm way off here]. What happens when such data do not exist? Or the data that do exist are either ambiguous or antagonistic to a particular political objective?
One possible answer suggests that the sociologist (or public intellectual) will harness his/her tools to discover hidden data. This answer is rooted to the a priori assumption of Truth. E.g., the group in question is treated badly; they do face structural barriers; we need only to document and measure the truth. [Additionally, this answer assumes that social science methodologies are up to the task].
I am currently doing some work on hate crime measurement. One of the most serious challenges we face in this work is sorting through all of the movement claimsmaking activity. Activists on either side marshal their experts (public sociologists?) to show how violence against X people is getting worse (or not getting worse). In doing so both sides gerrymander the definitions to achieve measurements that favor their intended outcomes.
What is a public sociologist to do in such situations? Should she pick a side and join the fray, or stay on the side and try to sort things out? In either case there's an uneasy tension. In one, we may be short selling science (that is, if you believe in the science of social science); in the other we may be undermining a cause which we support.