Political attacks on unaffiliated people or groups are nothing new - remember Anita Hill? But campaigns and commentators alike should now expect significant blowback from the people or organizations they assail, as well as their netroots-emboldened supporters, when they go after a political civilian to score points.

The latest case in point is Rush Limbaugh's misogynistic attack on Georgetown University law student Sandra Fluke, who testified before a congressional committee in favor of student health insurance plans at ...