Why would you assume that anyone who complains about political issues/candidates on the Internet cannot be "doing anything" for their community? As far as I know these two things are not mutually exclusive. In fact, I'd say people who are passionate enough to be up on the issues and have a strong opinion about them is probably more likely to care about other things as well.
I complain here, and I volunteer at our local USO. And I also do Stockings for Soldiers. Russ volunteers to play Taps at veterans funerals, and has served food at a local shelter.